Upsert records ↗

Summary: Add or update records in Pinecone indexes and manage data with namespaces.

Original Documentation

Documentation Index#
Fetch the complete documentation index at: https://docs.pinecone.io/llms.txt Use this file to discover all available pages before exploring further.

Add or update records in Pinecone indexes and manage data with namespaces.

This page shows you how to upsert records into a namespace in an index. Namespaces let you partition records within an index and are essential for implementing multitenancy when you need to isolate the data of each customer/user.

If a record ID already exists, upserting overwrites the entire record. To change only part of a record, update the record.

To control costs when ingesting large datasets (10,000,000+ records), use import instead of upsert.

Upsert dense vectors#

Upserting text is supported only for indexes with integrated embedding.

To upsert source text into a dense index with integrated embedding, use the upsert_records operation. Pinecone converts the text to dense vectors automatically using the hosted dense embedding model associated with the index.

Specify the namespace to upsert into. If the namespace doesn’t exist, it is created. To use the default namespace, set the namespace to "__default__".
Format your input data as records, each with the following:
- An _id field with a unique record identifier for the index namespace. id can be used as an alias for _id.
- A field with the source text to convert to a vector. This field must match the field_map specified in the index.
- Additional fields are stored as record metadata and can be returned in search results or used to filter search results.

For example, the following code converts the sentences in the chunk_text fields to dense vectors and then upserts them into example-namespace in an example index. The additional category field is stored as metadata.

    from pinecone import Pinecone

    pc = Pinecone(api_key="YOUR_API_KEY")

    # To get the unique host for an index, 
    # see https://docs.pinecone.io/guides/manage-data/target-an-index
    index = pc.Index(host="INDEX_HOST")

    # Upsert records into a namespace
    # `chunk_text` fields are converted to dense vectors
    # `category` fields are stored as metadata
    index.upsert_records(
        "example-namespace",
        [
            {
                "_id": "rec1",
                "chunk_text": "Apples are a great source of dietary fiber, which supports digestion and helps maintain a healthy gut.",
                "category": "digestive system", 
            },
            {
                "_id": "rec2",
                "chunk_text": "Apples originated in Central Asia and have been cultivated for thousands of years, with over 7,500 varieties available today.",
                "category": "cultivation",
            },
            {
                "_id": "rec3",
                "chunk_text": "Rich in vitamin C and other antioxidants, apples contribute to immune health and may reduce the risk of chronic diseases.",
                "category": "immune system",
            },
            {
                "_id": "rec4",
                "chunk_text": "The high fiber content in apples can also help regulate blood sugar levels, making them a favorable snack for people with diabetes.",
                "category": "endocrine system",
            },
        ]
    ) 
    ```

```javascript
    import { Pinecone } from '@pinecone-database/pinecone'

    const pc = new Pinecone({ apiKey: "YOUR_API_KEY" })

    // To get the unique host for an index, 
    // see https://docs.pinecone.io/guides/manage-data/target-an-index
    const namespace = pc.index("INDEX_NAME", "INDEX_HOST").namespace("example-namespace");

    // Upsert records into a namespace
    // `chunk_text` fields are converted to dense vectors
    // `category` is stored as metadata
    await namespace.upsertRecords([
            {
                "_id": "rec1",
                "chunk_text": "Apples are a great source of dietary fiber, which supports digestion and helps maintain a healthy gut.",
                "category": "digestive system", 
            },
            {
                "_id": "rec2",
                "chunk_text": "Apples originated in Central Asia and have been cultivated for thousands of years, with over 7,500 varieties available today.",
                "category": "cultivation",
            },
            {
                "_id": "rec3",
                "chunk_text": "Rich in vitamin C and other antioxidants, apples contribute to immune health and may reduce the risk of chronic diseases.",
                "category": "immune system",
            },
            {
                "_id": "rec4",
                "chunk_text": "The high fiber content in apples can also help regulate blood sugar levels, making them a favorable snack for people with diabetes.",
                "category": "endocrine system",
            }
    ]);
    ```

```java
    import io.pinecone.clients.Index;
    import io.pinecone.configs.PineconeConfig;
    import io.pinecone.configs.PineconeConnection;
    import org.openapitools.db_data.client.ApiException;

    import java.util.*;

    public class UpsertText {
        public static void main(String[] args) throws ApiException {
            PineconeConfig config = new PineconeConfig("YOUR_API_KEY");
            config.setHost("INDEX_HOST");
            PineconeConnection connection = new PineconeConnection(config);

            Index index = new Index(config, connection, "integrated-dense-java");
            ArrayList<Map<String, String>> upsertRecords = new ArrayList<>();

            HashMap<String, String> record1 = new HashMap<>();
            record1.put("_id", "rec1");
            record1.put("category", "digestive system");
            record1.put("chunk_text", "Apples are a great source of dietary fiber, which supports digestion and helps maintain a healthy gut.");

            HashMap<String, String> record2 = new HashMap<>();
            record2.put("_id", "rec2");
            record2.put("category", "cultivation");
            record2.put("chunk_text", "Apples originated in Central Asia and have been cultivated for thousands of years, with over 7,500 varieties available today.");

            HashMap<String, String> record3 = new HashMap<>();
            record3.put("_id", "rec3");
            record3.put("category", "immune system");
            record3.put("chunk_text", "Rich in vitamin C and other antioxidants, apples contribute to immune health and may reduce the risk of chronic diseases.");

            HashMap<String, String> record4 = new HashMap<>();
            record4.put("_id", "rec4");
            record4.put("category", "endocrine system");
            record4.put("chunk_text", "The high fiber content in apples can also help regulate blood sugar levels, making them a favorable snack for people with diabetes.");

            upsertRecords.add(record1);
            upsertRecords.add(record2);
            upsertRecords.add(record3);
            upsertRecords.add(record4);

            index.upsertRecords("example-namespace", upsertRecords);
        }
    }
    ```

```go
    package main

    import (
        "context"
        "fmt"
        "log"

        "github.com/pinecone-io/go-pinecone/v4/pinecone"
    )

    func main() {
        ctx := context.Background()

        pc, err := pinecone.NewClient(pinecone.NewClientParams{
            ApiKey: "YOUR_API_KEY",
        })
        if err != nil {
            log.Fatalf("Failed to create Client: %v", err)
        }

        // To get the unique host for an index, 
        // see https://docs.pinecone.io/guides/manage-data/target-an-index
        idxConnection, err := pc.Index(pinecone.NewIndexConnParams{Host: "INDEX_HOST", Namespace: "example-namespace"})
        if err != nil {
            log.Fatalf("Failed to create IndexConnection for Host: %v", err)
    	  }

        // Upsert records into a namespace
        // `chunk_text` fields are converted to dense vectors
        // `category` is stored as metadata
    	records := []*pinecone.IntegratedRecord{
            {
                "_id": "rec1",
                "chunk_text": "Apples are a great source of dietary fiber, which supports digestion and helps maintain a healthy gut.",
                "category": "digestive system", 
            },
            {
                "_id": "rec2",
                "chunk_text": "Apples originated in Central Asia and have been cultivated for thousands of years, with over 7,500 varieties available today.",
                "category": "cultivation",
            },
            {
                "_id": "rec3",
                "chunk_text": "Rich in vitamin C and other antioxidants, apples contribute to immune health and may reduce the risk of chronic diseases.",
                "category": "immune system",
            },
            {
                "_id": "rec4",
                "chunk_text": "The high fiber content in apples can also help regulate blood sugar levels, making them a favorable snack for people with diabetes.",
                "category": "endocrine system",
            },
    	}

    	err = idxConnection.UpsertRecords(ctx, records)
    	if err != nil {
    		log.Fatalf("Failed to upsert vectors: %v", err)
    	}
    }
    ```

```csharp
    using Pinecone;

    var pinecone = new PineconeClient("YOUR_API_KEY");

    var index = pinecone.Index(host: "INDEX_HOST");

    await index.UpsertRecordsAsync(
        "example-namespace",
        [
            new UpsertRecord
            {
                Id = "rec1",
                AdditionalProperties =
                {
                    ["chunk_text"] = "AAPL reported a year-over-year revenue increase, expecting stronger Q3 demand for its flagship phones.",
                    ["category"] = "technology",
                    ["quarter"] = "Q3",
                },
            },
            new UpsertRecord
            {
                Id = "rec2",
                AdditionalProperties =
                {
                    ["chunk_text"] = "AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space.",
                    ["category"] = "technology",
                    ["quarter"] = "Q4",
                },
            },  
            new UpsertRecord
            {
                Id = "rec3",
                AdditionalProperties =
                {
                    ["chunk_text"] = "AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space.",
                    ["category"] = "technology",
                    ["quarter"] = "Q4",
                },
            },
            new UpsertRecord
            {
                Id = "rec4",
                AdditionalProperties =
                {
                    ["chunk_text"] = "AAPL's strategic Q3 partnerships with semiconductor suppliers could mitigate component risks and stabilize iPhone production",
                    ["category"] = "technology",
                    ["quarter"] = "Q3",
                },
            },
        ]
    );
    ```

```shell
    # To get the unique host for an index,
    # see https://docs.pinecone.io/guides/manage-data/target-an-index
    INDEX_HOST="INDEX_HOST"
    NAMESPACE="YOUR_NAMESPACE"
    PINECONE_API_KEY="YOUR_API_KEY"

    # Upsert records into a namespace
    # `chunk_text` fields are converted to dense vectors
    # `category` is stored as metadata
    curl "https://$INDEX_HOST/records/namespaces/$NAMESPACE/upsert" \
      -H "Content-Type: application/x-ndjson" \
      -H "Api-Key: $PINECONE_API_KEY" \
      -H "X-Pinecone-Api-Version: 2025-10" \
      -d '{"_id": "rec1", "chunk_text": "Apples are a great source of dietary fiber, which supports digestion and helps maintain a healthy gut.", "category": "digestive system"}
          {"_id": "rec2", "chunk_text": "Apples originated in Central Asia and have been cultivated for thousands of years, with over 7,500 varieties available today.", "category": "cultivation"}
          {"_id": "rec3", "chunk_text": "Rich in vitamin C and other antioxidants, apples contribute to immune health and may reduce the risk of chronic diseases.", "category": "immune system"}
          {"_id": "rec4", "chunk_text": "The high fiber content in apples can also help regulate blood sugar levels, making them a favorable snack for people with diabetes.", "category": "endocrine system"}'
    ```

<span class="tab-end"></span>

<span class="tab-start" data-tab-title="Upsert vectors"></span>
To upsert dense vectors into a [dense index](/guides/index-data/create-an-index#create-a-dense-index), use the [`upsert`](/reference/api/latest/data-plane/upsert) operation as follows:

* Specify the [`namespace`](/guides/index-data/indexing-overview#namespaces) to upsert into. If the namespace doesn't exist, it is created. To use the default namespace, set the namespace to `"__default__"`.
* Format your input data as records, each with the following:
* An `id` field with a unique record identifier for the index namespace.
* A `values` field with the dense vector values.
* Optionally, a `metadata` field with [key-value pairs](/guides/index-data/indexing-overview#metadata) to store additional information or context. When you query the index, you can use metadata to [filter search results](/guides/search/filter-by-metadata).


```Python
    from pinecone.grpc import PineconeGRPC as Pinecone

    pc = Pinecone(api_key="YOUR_API_KEY")

    # To get the unique host for an index, 
    # see https://docs.pinecone.io/guides/manage-data/target-an-index
    index = pc.Index(host="INDEX_HOST")

    index.upsert(
      vectors=[
        {
          "id": "A", 
          "values": [0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1], 
          "metadata": {"genre": "comedy", "year": 2020}
        },
        {
          "id": "B", 
          "values": [0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2],
          "metadata": {"genre": "documentary", "year": 2019}
        },
        {
          "id": "C", 
          "values": [0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3],
          "metadata": {"genre": "comedy", "year": 2019}
        },
        {
          "id": "D", 
          "values": [0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4],
          "metadata": {"genre": "drama"}
        }
      ],
      namespace="example-namespace"
    )
    ```

```javascript
    import { Pinecone } from '@pinecone-database/pinecone'

    const pc = new Pinecone({ apiKey: "YOUR_API_KEY" })

    // To get the unique host for an index, 
    // see https://docs.pinecone.io/guides/manage-data/target-an-index
    const index = pc.index("INDEX_NAME", "INDEX_HOST")

    const records = [
        {
          id: 'A',
          values: [0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1],
          metadata: { genre: "comedy", year: 2020 },
        },
        {
          id: 'B',
          values: [0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2],
          metadata: { genre: "documentary", year: 2019 },
        },
        {
          id: 'C',
          values: [0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3],
          metadata: { genre: "comedy", year: 2019 },
        },
        {
          id: 'D',
          values: [0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4],
          metadata: { genre: "drama" },
        }
    ]

    await index.('example-namespace').upsert(records);
    ```

```java
    import com.google.protobuf.Struct;
    import com.google.protobuf.Value;
    import io.pinecone.clients.Index;
    import io.pinecone.configs.PineconeConfig;
    import io.pinecone.configs.PineconeConnection;

    import java.util.Arrays;
    import java.util.List;

    public class UpsertExample {
        public static void main(String[] args) {
            PineconeConfig config = new PineconeConfig("YOUR_API_KEY");
            // To get the unique host for an index, 
            // see https://docs.pinecone.io/guides/manage-data/target-an-index
            config.setHost("INDEX_HOST");
            PineconeConnection connection = new PineconeConnection(config);
            Index index = new Index(connection, "INDEX_NAME");
            List<Float> values1 = Arrays.asList(0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f);
            List<Float> values2 = Arrays.asList(0.2f, 0.2f, 0.2f, 0.2f, 0.2f, 0.2f, 0.2f, 0.2f);
            List<Float> values3 = Arrays.asList(0.3f, 0.3f, 0.3f, 0.3f, 0.3f, 0.3f, 0.3f, 0.3f);
            List<Float> values4 = Arrays.asList(0.4f, 0.4f, 0.4f, 0.4f, 0.4f, 0.4f, 0.4f, 0.4f);
            Struct metaData1 = Struct.newBuilder()
                    .putFields("genre", Value.newBuilder().setStringValue("comedy").build())
                    .putFields("year", Value.newBuilder().setNumberValue(2020).build())
                    .build();
            Struct metaData2 = Struct.newBuilder()
                    .putFields("genre", Value.newBuilder().setStringValue("documentary").build())
                    .putFields("year", Value.newBuilder().setNumberValue(2019).build())
                    .build();
            Struct metaData3 = Struct.newBuilder()
                    .putFields("genre", Value.newBuilder().setStringValue("comedy").build())
                    .putFields("year", Value.newBuilder().setNumberValue(2019).build())
                    .build();
            Struct metaData4 = Struct.newBuilder()
                    .putFields("genre", Value.newBuilder().setStringValue("drama").build())
                    .build();

            index.upsert("A", values1, null, null, metaData1, 'example-namespace');
            index.upsert("B", values2, null, null, metaData2, 'example-namespace');
            index.upsert("C", values3, null, null, metaData3, 'example-namespace');
            index.upsert("D", values4, null, null, metaData4, 'example-namespace');
        }
    }
    ```

```go
    package main

    import (
        "context"
        "fmt"
        "log"

        "github.com/pinecone-io/go-pinecone/v4/pinecone"
        "google.golang.org/protobuf/types/known/structpb"
    )

    func main() {
        ctx := context.Background()

        pc, err := pinecone.NewClient(pinecone.NewClientParams{
            ApiKey: "YOUR_API_KEY",
        })
        if err != nil {
            log.Fatalf("Failed to create Client: %v", err)
        }

        // To get the unique host for an index, 
        // see https://docs.pinecone.io/guides/manage-data/target-an-index
        idxConnection, err := pc.Index(pinecone.NewIndexConnParams{Host: "INDEX_HOST", Namespace: "example-namespace"})
        if err != nil {
            log.Fatalf("Failed to create IndexConnection for Host: %v", err)
    	  }

        metadataMap1 := map[string]interface{}{
            "genre": "comedy",
            "year": 2020,
        }

        metadata1, err := structpb.NewStruct(metadataMap1)
        if err != nil {
            log.Fatalf("Failed to create metadata map: %v", err)
        }

        metadataMap2 := map[string]interface{}{
            "genre": "documentary",
            "year": 2019,
        }

        metadata2, err := structpb.NewStruct(metadataMap2)
        if err != nil {
            log.Fatalf("Failed to create metadata map: %v", err)
        }

        metadataMap3 := map[string]interface{}{
            "genre": "comedy",
            "year": 2019,
        }

        metadata3, err := structpb.NewStruct(metadataMap3)
        if err != nil {
            log.Fatalf("Failed to create metadata map: %v", err)
        }

        metadataMap4 := map[string]interface{}{
            "genre": "drama",
        }

        metadata4, err := structpb.NewStruct(metadataMap4)
        if err != nil {
            log.Fatalf("Failed to create metadata map: %v", err)
        }

        vectors := []*pinecone.Vector{
            {
                Id:     "A",
                Values: []float32{0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1},
                Metadata: metadata1,
            },
            {
                Id:     "B",
                Values: []float32{0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2},
                Metadata: metadata2,
            },
            {
                Id:     "C",
                Values: []float32{0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3},
                Metadata: metadata3,
            },   
            {
                Id:     "D",
                Values: []float32{0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4},
                Metadata: metadata4,
            },   
        }

        count, err := idxConnection.UpsertVectors(ctx, vectors)
        if err != nil {
            log.Fatalf("Failed to upsert vectors: %v", err)
        } else {
            fmt.Printf("Successfully upserted %d vector(s)!\n", count)
        }
    }
    ```

```csharp
    using Pinecone;

    var pinecone = new PineconeClient("YOUR_API_KEY");

    // To get the unique host for an index, 
    // see https://docs.pinecone.io/guides/manage-data/target-an-index
    var index = pinecone.Index(host: "INDEX_HOST");

    var upsertResponse = await index.UpsertAsync(new UpsertRequest {
        Vectors = new[]
        {
            new Vector
            {
                Id = "A",
                Values = new[] { 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f },
                Metadata = new Metadata {
                    ["genre"] = new("comedy"),
                    ["year"] = new(2020),
                },
            },
            new Vector
            {
                Id = "B",
                Values = new[] { 0.2f, 0.2f, 0.2f, 0.2f, 0.2f, 0.2f, 0.2f, 0.2f },
                Metadata = new Metadata {
                    ["genre"] = new("documentary"),
                    ["year"] = new(2019),
                },
            },
            new Vector
            {
                Id = "C",
                Values = new[] { 0.3f, 0.3f, 0.3f, 0.3f, 0.3f, 0.3f, 0.3f, 0.3f },
                Metadata = new Metadata {
                    ["genre"] = new("comedy"),
                    ["year"] = new(2019),
                },
            },
            new Vector
            {
                Id = "D",
                Values = new[] { 0.4f, 0.4f, 0.4f, 0.4f, 0.4f, 0.4f, 0.4f, 0.4f },
                Metadata = new Metadata {
                    ["genre"] = new("drama"),
                },
            }
        },
        Namespace = "example-namespace",
    });
    ```

```bash
    # To get the unique host for an index,
    # see https://docs.pinecone.io/guides/manage-data/target-an-index
    PINECONE_API_KEY="YOUR_API_KEY"
    INDEX_HOST="INDEX_HOST"

    curl "https://$INDEX_HOST/vectors/upsert" \
      -H "Api-Key: $PINECONE_API_KEY" \
      -H 'Content-Type: application/json' \
      -H "X-Pinecone-Api-Version: 2025-10" \
      -d '{
        "vectors": [
          {
            "id": "A",
            "values": [0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1],
            "metadata": {"genre": "comedy", "year": 2020}
          },
          {
            "id": "B",
            "values": [0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2, 0.2],
            "metadata": {"genre": "documentary", "year": 2019}
          },
          {
            "id": "C",
            "values": [0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3],
            "metadata": {"genre": "comedy", "year": 2019}
          },
          {
            "id": "D",
            "values": [0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4],
            "metadata": {"genre": "drama"}
          }
        ],
        "namespace": "example-namespace"
      }'
    ```

<span class="tab-end"></span>
<span class="tab-group-end"></span>

## Upsert sparse vectors

<span class="tab-group-start"></span>
<span class="tab-start" data-tab-title="Upsert text"></span>
<span class="callout-start" data-callout-type="note"></span>
Upserting text is supported only for [indexes with integrated embedding](/guides/index-data/indexing-overview#integrated-embedding).
<span class="callout-end"></span>

To upsert source text into a [sparse index with integrated embedding](/guides/index-data/create-an-index#create-a-sparse-index), use the [`upsert_records`](/reference/api/latest/data-plane/upsert_records) operation. Pinecone converts the text to sparse vectors automatically using the hosted sparse embedding model associated with the index.

* Specify the [`namespace`](/guides/index-data/indexing-overview#namespaces) to upsert into. If the namespace doesn't exist, it is created. To use the default namespace, set the namespace to `"__default__"`.
* Format your input data as records, each with the following:
* An `_id` field with a unique record identifier for the index namespace. `id` can be used as an alias for `_id`.
* A field with the source text to convert to a vector. This field must match the `field_map` specified in the index.
* Additional fields are stored as record [metadata](/guides/index-data/indexing-overview#metadata) and can be returned in search results or used to [filter search results](/guides/search/filter-by-metadata).

For example, the following code converts the sentences in the `chunk_text` fields to sparse vectors and then upserts them into `example-namespace` in an example index. The additional `category` and `quarter` fields are stored as metadata.


```python
    from pinecone import Pinecone

    pc = Pinecone(api_key="YOUR_API_KEY")

    # To get the unique host for an index, 
    # see https://docs.pinecone.io/guides/manage-data/target-an-index
    index = pc.Index(host="INDEX_HOST")

    # Upsert records into a namespace
    # `chunk_text` fields are converted to sparse vectors
    # `category` and `quarter` fields are stored as metadata
    index.upsert_records(
        "example-namespace",
        [
            { 
                "_id": "vec1", 
                "chunk_text": "AAPL reported a year-over-year revenue increase, expecting stronger Q3 demand for its flagship phones.", 
                "category": "technology",
                "quarter": "Q3"
            },
            { 
                "_id": "vec2", 
                "chunk_text": "Analysts suggest that AAPL'\''s upcoming Q4 product launch event might solidify its position in the premium smartphone market.", 
                "category": "technology",
                "quarter": "Q4"
            },
            { 
                "_id": "vec3", 
                "chunk_text": "AAPL'\''s strategic Q3 partnerships with semiconductor suppliers could mitigate component risks and stabilize iPhone production.",
                "category": "technology",
                "quarter": "Q3"
            },
            { 
                "_id": "vec4", 
                "chunk_text": "AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space.", 
                "category": "technology",
                "quarter": "Q4"
            }
        ]
    )

    time.sleep(10) # Wait for the upserted vectors to be indexed
    ```

```javascript
    import { Pinecone } from '@pinecone-database/pinecone'

    const pc = new Pinecone({ apiKey: "YOUR_API_KEY" })

    // To get the unique host for an index, 
    // see https://docs.pinecone.io/guides/manage-data/target-an-index
    const namespace = pc.index("INDEX_NAME", "INDEX_HOST").namespace("example-namespace");

    // Upsert records into a namespace
    // `chunk_text` fields are converted to sparse vectors
    // `category` and `quarter` fields are stored as metadata
    await namespace.upsertRecords([
        { 
            "_id": "vec1", 
            "chunk_text": "AAPL reported a year-over-year revenue increase, expecting stronger Q3 demand for its flagship phones.", 
            "category": "technology",
            "quarter": "Q3"
        },
        { 
            "_id": "vec2", 
            "chunk_text": "Analysts suggest that AAPL'\''s upcoming Q4 product launch event might solidify its position in the premium smartphone market.", 
            "category": "technology",
            "quarter": "Q4"
        },
        { 
            "_id": "vec3", 
            "chunk_text": "AAPL'\''s strategic Q3 partnerships with semiconductor suppliers could mitigate component risks and stabilize iPhone production.",
            "category": "technology",
            "quarter": "Q3"
        },
        { 
            "_id": "vec4", 
            "chunk_text": "AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space.", 
            "category": "technology",
            "quarter": "Q4"
        }
    ]);
    ```

```java
    import io.pinecone.clients.Index;
    import io.pinecone.configs.PineconeConfig;
    import io.pinecone.configs.PineconeConnection;
    import org.openapitools.db_data.client.ApiException;

    import java.util.*;

    public class UpsertText {
        public static void main(String[] args) throws ApiException {
            PineconeConfig config = new PineconeConfig("YOUR_API_KEY");
            config.setHost("INDEX_HOST");
            PineconeConnection connection = new PineconeConnection(config);

            Index index = new Index(config, connection, "integrated-sparse-java");
            ArrayList<Map<String, String>> upsertRecords = new ArrayList<>();

            HashMap<String, String> record1 = new HashMap<>();
            record1.put("_id", "rec1");
            record1.put("category", "digestive system");
            record1.put("chunk_text", "Apples are a great source of dietary fiber, which supports digestion and helps maintain a healthy gut.");

            HashMap<String, String> record2 = new HashMap<>();
            record2.put("_id", "rec2");
            record2.put("category", "cultivation");
            record2.put("chunk_text", "Apples originated in Central Asia and have been cultivated for thousands of years, with over 7,500 varieties available today.");

            HashMap<String, String> record3 = new HashMap<>();
            record3.put("_id", "rec3");
            record3.put("category", "immune system");
            record3.put("chunk_text", "Rich in vitamin C and other antioxidants, apples contribute to immune health and may reduce the risk of chronic diseases.");

            HashMap<String, String> record4 = new HashMap<>();
            record4.put("_id", "rec4");
            record4.put("category", "endocrine system");
            record4.put("chunk_text", "The high fiber content in apples can also help regulate blood sugar levels, making them a favorable snack for people with diabetes.");

            upsertRecords.add(record1);
            upsertRecords.add(record2);
            upsertRecords.add(record3);
            upsertRecords.add(record4);

            index.upsertRecords("example-namespace", upsertRecords);
        }
    }
    ```

```go
    package main

    import (
        "context"
        "fmt"
        "log"

        "github.com/pinecone-io/go-pinecone/v4/pinecone"
    )

    func main() {
        ctx := context.Background()

        pc, err := pinecone.NewClient(pinecone.NewClientParams{
            ApiKey: "YOUR_API_KEY",
        })
        if err != nil {
            log.Fatalf("Failed to create Client: %v", err)
        }

        // To get the unique host for an index, 
        // see https://docs.pinecone.io/guides/manage-data/target-an-index
        idxConnection, err := pc.Index(pinecone.NewIndexConnParams{Host: "INDEX_HOST", Namespace: "example-namespace"})
        if err != nil {
            log.Fatalf("Failed to create IndexConnection for Host: %v", err)
    	  }

        // Upsert records into a namespace
        // `chunk_text` fields are converted to sparse vectors
        // `category` and `quarter` fields are stored as metadata
    	records := []*pinecone.IntegratedRecord{
    		{
    			"_id":        "vec1",
    			"chunk_text": "AAPL reported a year-over-year revenue increase, expecting stronger Q3 demand for its flagship phones.",
    			"category":   "technology",
    			"quarter":    "Q3",
    		},
    		{
    			"_id":        "vec2",
    			"chunk_text": "Analysts suggest that AAPL's upcoming Q4 product launch event might solidify its position in the premium smartphone market.",
    			"category":   "technology",
    			"quarter":    "Q4",
    		},
    		{
    			"_id":        "vec3",
    			"chunk_text": "AAPL's strategic Q3 partnerships with semiconductor suppliers could mitigate component risks and stabilize iPhone production.",
    			"category":   "technology",
    			"quarter":    "Q3",
    		},
    		{
    			"_id":        "vec4",
    			"chunk_text": "AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space.",
    			"category":   "technology",
    			"quarter":    "Q4",
    		},
    	}

    	err = idxConnection.UpsertRecords(ctx, records)
    	if err != nil {
    		log.Fatalf("Failed to upsert vectors: %v", err)
    	}
    }
    ```

```csharp
    using Pinecone;

    var pinecone = new PineconeClient("YOUR_API_KEY");

    var index = pinecone.Index(host: "INDEX_HOST");

    await index.UpsertRecordsAsync(
        "example-namespace",
        [
            new UpsertRecord
            {
                Id = "rec1",
                AdditionalProperties =
                {
                    ["chunk_text"] = "AAPL reported a year-over-year revenue increase, expecting stronger Q3 demand for its flagship phones.",
                    ["category"] = "technology",
                    ["quarter"] = "Q3",
                },
            },
            new UpsertRecord
            {
                Id = "rec2",
                AdditionalProperties =
                {
                    ["chunk_text"] = "AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space.",
                    ["category"] = "technology",
                    ["quarter"] = "Q4",
                },
            },  
            new UpsertRecord
            {
                Id = "rec3",
                AdditionalProperties =
                {
                    ["chunk_text"] = "AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space.",
                    ["category"] = "technology",
                    ["quarter"] = "Q4",
                },
            },
            new UpsertRecord
            {
                Id = "rec4",
                AdditionalProperties =
                {
                    ["chunk_text"] = "AAPL's strategic Q3 partnerships with semiconductor suppliers could mitigate component risks and stabilize iPhone production",
                    ["category"] = "technology",
                    ["quarter"] = "Q3",
                },
            },
        ]
    );
    ```

```shell
    INDEX_HOST="INDEX_HOST"
    NAMESPACE="YOUR_NAMESPACE"
    PINECONE_API_KEY="YOUR_API_KEY"

    curl  "https://$INDEX_HOST/records/namespaces/$NAMESPACE/upsert" \
        -H "Content-Type: application/x-ndjson" \
        -H "Api-Key: $PINECONE_API_KEY" \
        -H "X-Pinecone-Api-Version: 2025-10" \
        -d '{ "_id": "vec1", "chunk_text": "AAPL reported a year-over-year revenue increase, expecting stronger Q3 demand for its flagship phones.", "category": "technology", "quarter": "Q3" }
          { "_id": "vec2", "chunk_text": "Analysts suggest that AAPL'\''s upcoming Q4 product launch event might solidify its position in the premium smartphone market.", "category": "technology", "quarter": "Q4" }
          { "_id": "vec3", "chunk_text": "AAPL'\''s strategic Q3 partnerships with semiconductor suppliers could mitigate component risks and stabilize iPhone production.", "category": "technology", "quarter": "Q3" }
          { "_id": "vec4", "chunk_text": "AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space.", "category": "technology", "quarter": "Q4" }'
    ```

<span class="tab-end"></span>

<span class="tab-start" data-tab-title="Upsert vectors"></span>
To upsert sparse vectors into a [sparse index](/guides/index-data/create-an-index#create-a-sparse-index), use the [`upsert`](/reference/api/latest/data-plane/upsert) operation as follows:

* Specify the [`namespace`](/guides/index-data/indexing-overview#namespaces) to upsert into. If the namespace doesn't exist, it is created. To use the default namespace, set the namespace to `"__default__"`.
* Format your input data as records, each with the following:
* An `id` field with a unique record identifier for the index namespace.
* A `sparse_values` field with the sparse vector values and indices.
* Optionally, a `metadata` field with [key-value pairs](/guides/index-data/indexing-overview#metadata) to store additional information or context. When you query the index, you can use metadata to [filter search results](/guides/search/filter-by-metadata).

For example, the following code upserts sparse vector representations of sentences related to the term "apple", with the source text and additional fields stored as metadata:


```python
    from pinecone import Pinecone, SparseValues, Vector

    pc = Pinecone(api_key="YOUR_API_KEY")

    # To get the unique host for an index, 
    # see https://docs.pinecone.io/guides/manage-data/target-an-index
    index = pc.Index(host="INDEX_HOST")

    index.upsert(
        namespace="example-namespace",
        vectors=[
            {
                "id": "vec1",
                "sparse_values": {
                    "values": [1.7958984, 0.41577148, 2.828125, 2.8027344, 2.8691406, 1.6533203, 5.3671875, 1.3046875, 0.49780273, 0.5722656, 2.71875, 3.0820312, 2.5019531, 4.4414062, 3.3554688],
                    "indices": [822745112, 1009084850, 1221765879, 1408993854, 1504846510, 1596856843, 1640781426, 1656251611, 1807131503, 2543655733, 2902766088, 2909307736, 3246437992, 3517203014, 3590924191]
                },
                "metadata": {
                    "chunk_text": "AAPL reported a year-over-year revenue increase, expecting stronger Q3 demand for its flagship phones.",
                    "category": "technology",
                    "quarter": "Q3"
                }
            },
            {
                "id": "vec2",
                "sparse_values": {
                    "values": [0.4362793, 3.3457031, 2.7714844, 3.0273438, 3.3164062, 5.6015625, 2.4863281, 0.38134766, 1.25, 2.9609375, 0.34179688, 1.4306641, 0.34375, 3.3613281, 1.4404297, 2.2558594, 2.2597656, 4.8710938, 0.5605469],
                    "indices": [131900689, 592326839, 710158994, 838729363, 1304885087, 1640781426, 1690623792, 1807131503, 2066971792, 2428553208, 2548600401, 2577534050, 3162218338, 3319279674, 3343062801, 3476647774, 3485013322, 3517203014, 4283091697]
                },
                "metadata": {
                    "chunk_text": "Analysts suggest that AAPL'\''s upcoming Q4 product launch event might solidify its position in the premium smartphone market.",
                    "category": "technology",
                    "quarter": "Q4"
                }
            },
            {
                "id": "vec3",
                "sparse_values": {
                    "values": [2.6875, 4.2929688, 3.609375, 3.0722656, 2.1152344, 5.78125, 3.7460938, 3.7363281, 1.2695312, 3.4824219, 0.7207031, 0.0826416, 4.671875, 3.7011719, 2.796875, 0.61621094],
                    "indices": [8661920, 350356213, 391213188, 554637446, 1024951234, 1640781426, 1780689102, 1799010313, 2194093370, 2632344667, 2641553256, 2779594451, 3517203014, 3543799498, 3837503950, 4283091697]
                },
                "metadata": {
                    "chunk_text": "AAPL'\''s strategic Q3 partnerships with semiconductor suppliers could mitigate component risks and stabilize iPhone production",
                    "category": "technology",
                    "quarter": "Q3"
                }
            },
            {
                "id": "vec4",
                "sparse_values": {
                    "values": [0.73046875, 0.46972656, 2.84375, 5.2265625, 3.3242188, 1.9863281, 0.9511719, 0.5019531, 4.4257812, 3.4277344, 0.41308594, 4.3242188, 2.4179688, 3.1757812, 1.0224609, 2.0585938, 2.5859375],
                    "indices": [131900689, 152217691, 441495248, 1640781426, 1851149807, 2263326288, 2502307765, 2641553256, 2684780967, 2966813704, 3162218338, 3283104238, 3488055477, 3530642888, 3888762515, 4152503047, 4177290673]
                },
                "metadata": {
                    "chunk_text": "AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space.",
                    "category": "technology",
                    "quarter": "Q4"
                }
            }
        ]
    )
    ```

```javascript
    import { Pinecone } from '@pinecone-database/pinecone'

    const pc = new Pinecone({ apiKey: 'YOUR_API_KEY' });

    // To get the unique host for an index, 
    // see https://docs.pinecone.io/guides/manage-data/target-an-index
    const index = pc.index("INDEX_NAME", "INDEX_HOST")

    await index.namespace('example-namespace').upsert([
      {
        id: 'vec1',
        sparseValues: {
          indices: [822745112, 1009084850, 1221765879, 1408993854, 1504846510, 1596856843, 1640781426, 1656251611, 1807131503, 2543655733, 2902766088, 2909307736, 3246437992, 3517203014, 3590924191],
          values: [1.7958984, 0.41577148, 2.828125, 2.8027344, 2.8691406, 1.6533203, 5.3671875, 1.3046875, 0.49780273, 0.5722656, 2.71875, 3.0820312, 2.5019531, 4.4414062, 3.3554688]
        },
        metadata: { 
          chunk_text: 'AAPL reported a year-over-year revenue increase, expecting stronger Q3 demand for its flagship phones.', 
          category: 'technology',
          quarter: 'Q3' 
        }
      },
      {
        id: 'vec2',
        sparseValues: {
          indices: [131900689, 592326839, 710158994, 838729363, 1304885087, 1640781426, 1690623792, 1807131503, 2066971792, 2428553208, 2548600401, 2577534050, 3162218338, 3319279674, 3343062801, 3476647774, 3485013322, 3517203014, 4283091697],
          values: [0.4362793, 3.3457031, 2.7714844, 3.0273438, 3.3164062, 5.6015625, 2.4863281, 0.38134766, 1.25, 2.9609375, 0.34179688, 1.4306641, 0.34375, 3.3613281, 1.4404297, 2.2558594, 2.2597656, 4.8710938, 0.5605469]
        },
        metadata: { 
          chunk_text: "Analysts suggest that AAPL's upcoming Q4 product launch event might solidify its position in the premium smartphone market.", 
          category: 'technology',
          quarter: 'Q4' 
        }
      },
      {
        id: 'vec3',
        sparseValues: {
          indices: [8661920, 350356213, 391213188, 554637446, 1024951234, 1640781426, 1780689102, 1799010313, 2194093370, 2632344667, 2641553256, 2779594451, 3517203014, 3543799498, 3837503950, 4283091697],
          values: [2.6875, 4.2929688, 3.609375, 3.0722656, 2.1152344, 5.78125, 3.7460938, 3.7363281, 1.2695312, 3.4824219, 0.7207031, 0.0826416, 4.671875, 3.7011719, 2.796875, 0.61621094]
        },
        metadata: { 
          chunk_text: "AAPL's strategic Q3 partnerships with semiconductor suppliers could mitigate component risks and stabilize iPhone production", 
          category: 'technology',
          quarter: 'Q3' 
        }
      },
      {
        id: 'vec4',
        sparseValues: {
          indices: [131900689, 152217691, 441495248, 1640781426, 1851149807, 2263326288, 2502307765, 2641553256, 2684780967, 2966813704, 3162218338, 3283104238, 3488055477, 3530642888, 3888762515, 4152503047, 4177290673],
          values: [0.73046875, 0.46972656, 2.84375, 5.2265625, 3.3242188, 1.9863281, 0.9511719, 0.5019531, 4.4257812, 3.4277344, 0.41308594, 4.3242188, 2.4179688, 3.1757812, 1.0224609, 2.0585938, 2.5859375]
        },
        metadata: { 
          chunk_text: 'AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space.', 
          category: 'technology',
          quarter: 'Q4' 
        }
      }
    ]);
    ```

```java
    import io.pinecone.clients.Pinecone;
    import io.pinecone.clients.Index;
    import com.google.protobuf.Struct;
    import com.google.protobuf.Value;

    import java.util.*;

    public class UpsertSparseVectors {
        public static void main(String[] args) throws InterruptedException {
            // Instantiate Pinecone class
            Pinecone pinecone = new Pinecone.Builder("YOUR_API)KEY").build();
            
            Index index = pinecone.getIndexConnection("docs-example");

            // Record 1
            ArrayList<Long> indices1 = new ArrayList<>(Arrays.asList(
                    822745112L, 1009084850L, 1221765879L, 1408993854L, 1504846510L,
                    1596856843L, 1640781426L, 1656251611L, 1807131503L, 2543655733L,
                    2902766088L, 2909307736L, 3246437992L, 3517203014L, 3590924191L
            ));

            ArrayList<Float> values1 = new ArrayList<>(Arrays.asList(
                    1.7958984f, 0.41577148f, 2.828125f, 2.8027344f, 2.8691406f,
                    1.6533203f, 5.3671875f, 1.3046875f, 0.49780273f, 0.5722656f,
                    2.71875f, 3.0820312f, 2.5019531f, 4.4414062f, 3.3554688f
            ));

            Struct metaData1 = Struct.newBuilder()
                    .putFields("chunk_text", Value.newBuilder().setStringValue("AAPL reported a year-over-year revenue increase, expecting stronger Q3 demand for its flagship phones.").build())
                    .putFields("category", Value.newBuilder().setStringValue("technology").build())
                    .putFields("quarter", Value.newBuilder().setStringValue("Q3").build())
                    .build();

            // Record 2
            ArrayList<Long> indices2 = new ArrayList<>(Arrays.asList(
                    131900689L, 592326839L, 710158994L, 838729363L, 1304885087L,
                    1640781426L, 1690623792L, 1807131503L, 2066971792L, 2428553208L,
                    2548600401L, 2577534050L, 3162218338L, 3319279674L, 3343062801L,
                    3476647774L, 3485013322L, 3517203014L, 4283091697L
            ));

            ArrayList<Float> values2 = new ArrayList<>(Arrays.asList(
                    0.4362793f, 3.3457031f, 2.7714844f, 3.0273438f, 3.3164062f,
                    5.6015625f, 2.4863281f, 0.38134766f, 1.25f, 2.9609375f,
                    0.34179688f, 1.4306641f, 0.34375f, 3.3613281f, 1.4404297f,
                    2.2558594f, 2.2597656f, 4.8710938f, 0.5605469f
            ));

            Struct metaData2 = Struct.newBuilder()
                    .putFields("chunk_text", Value.newBuilder().setStringValue("Analysts suggest that AAPL'\\''s upcoming Q4 product launch event might solidify its position in the premium smartphone market.").build())
                    .putFields("category", Value.newBuilder().setStringValue("technology").build())
                    .putFields("quarter", Value.newBuilder().setStringValue("Q4").build())
                    .build();

            // Record 3
            ArrayList<Long> indices3 = new ArrayList<>(Arrays.asList(
                    8661920L, 350356213L, 391213188L, 554637446L, 1024951234L,
                    1640781426L, 1780689102L, 1799010313L, 2194093370L, 2632344667L,
                    2641553256L, 2779594451L, 3517203014L, 3543799498L,
                    3837503950L, 4283091697L
            ));

            ArrayList<Float> values3 = new ArrayList<>(Arrays.asList(
                    2.6875f, 4.2929688f, 3.609375f, 3.0722656f, 2.1152344f,
                    5.78125f, 3.7460938f, 3.7363281f, 1.2695312f, 3.4824219f,
                    0.7207031f, 0.0826416f, 4.671875f, 3.7011719f, 2.796875f,
                    0.61621094f
            ));

            Struct metaData3 = Struct.newBuilder()
                    .putFields("chunk_text", Value.newBuilder().setStringValue("AAPL'\\''s strategic Q3 partnerships with semiconductor suppliers could mitigate component risks and stabilize iPhone production").build())
                    .putFields("category", Value.newBuilder().setStringValue("technology").build())
                    .putFields("quarter", Value.newBuilder().setStringValue("Q3").build())
                    .build();

            // Record 4
            ArrayList<Long> indices4 = new ArrayList<>(Arrays.asList(
                    131900689L, 152217691L, 441495248L, 1640781426L, 1851149807L,
                    2263326288L, 2502307765L, 2641553256L, 2684780967L, 2966813704L,
                    3162218338L, 3283104238L, 3488055477L, 3530642888L, 3888762515L,
                    4152503047L, 4177290673L
            ));

            ArrayList<Float> values4 = new ArrayList<>(Arrays.asList(
                    0.73046875f, 0.46972656f, 2.84375f, 5.2265625f, 3.3242188f,
                    1.9863281f, 0.9511719f, 0.5019531f, 4.4257812f, 3.4277344f,
                    0.41308594f, 4.3242188f, 2.4179688f, 3.1757812f, 1.0224609f,
                    2.0585938f, 2.5859375f
            ));

            Struct metaData4 = Struct.newBuilder()
                    .putFields("chunk_text", Value.newBuilder().setStringValue("AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space").build())
                    .putFields("category", Value.newBuilder().setStringValue("technology").build())
                    .putFields("quarter", Value.newBuilder().setStringValue("Q4").build())
                    .build();

            index.upsert("vec1", Collections.emptyList(), indices1, values1, metaData1, "example-namespace");
            index.upsert("vec2", Collections.emptyList(), indices2, values2, metaData2, "example-namespace");
            index.upsert("vec3", Collections.emptyList(), indices3, values3, metaData3, "example-namespace");
            index.upsert("vec4", Collections.emptyList(), indices4, values4, metaData4, "example-namespace");
    ```

```go
    package main

    import (
    	"context"
    	"fmt"
    	"log"

    	"github.com/pinecone-io/go-pinecone/v4/pinecone"
    	"google.golang.org/protobuf/types/known/structpb"
    )

    func main() {
    	ctx := context.Background()

    	pc, err := pinecone.NewClient(pinecone.NewClientParams{
    		ApiKey: "YOUR_API_KEY",
    	})
    	if err != nil {
    		log.Fatalf("Failed to create Client: %v", err)
    	}

    	// To get the unique host for an index,
    	// see https://docs.pinecone.io/guides/manage-data/target-an-index
    	idxConnection, err := pc.Index(pinecone.NewIndexConnParams{Host: "INDEX_HOST", Namespace: "example-namespace"})
    	if err != nil {
    		log.Fatalf("Failed to create IndexConnection for Host: %v", err)
    	}

    	sparseValues1 := pinecone.SparseValues{
    		Indices: []uint32{822745112, 1009084850, 1221765879, 1408993854, 1504846510, 1596856843, 1640781426, 1656251611, 1807131503, 2543655733, 2902766088, 2909307736, 3246437992, 3517203014, 3590924191},
    		Values:  []float32{1.7958984, 0.41577148, 2.828125, 2.8027344, 2.8691406, 1.6533203, 5.3671875, 1.3046875, 0.49780273, 0.5722656, 2.71875, 3.0820312, 2.5019531, 4.4414062, 3.3554688},
    	}

    	metadataMap1 := map[string]interface{}{
    		"chunk_text": "AAPL reported a year-over-year revenue increase, expecting stronger Q3 demand for its flagship phones",
    		"category":    "technology",
    		"quarter":     "Q3",
    	}

    	metadata1, err := structpb.NewStruct(metadataMap1)
    	if err != nil {
    		log.Fatalf("Failed to create metadata map: %v", err)
    	}

    	sparseValues2 := pinecone.SparseValues{
    		Indices: []uint32{131900689, 592326839, 710158994, 838729363, 1304885087, 1640781426, 1690623792, 1807131503, 2066971792, 2428553208, 2548600401, 2577534050, 3162218338, 3319279674, 3343062801, 3476647774, 3485013322, 3517203014, 4283091697},
    		Values:  []float32{0.4362793, 3.3457031, 2.7714844, 3.0273438, 3.3164062, 5.6015625, 2.4863281, 0.38134766, 1.25, 2.9609375, 0.34179688, 1.4306641, 0.34375, 3.3613281, 1.4404297, 2.2558594, 2.2597656, 4.8710938, 0.560546},
    	}

    	metadataMap2 := map[string]interface{}{
    		"chunk_text": "Analysts suggest that AAPL's upcoming Q4 product launch event might solidify its position in the premium smartphone market.",
    		"category":    "technology",
    		"quarter":     "Q4",
    	}

    	metadata2, err := structpb.NewStruct(metadataMap2)
    	if err != nil {
    		log.Fatalf("Failed to create metadata map: %v", err)
    	}

    	sparseValues3 := pinecone.SparseValues{
    		Indices: []uint32{8661920, 350356213, 391213188, 554637446, 1024951234, 1640781426, 1780689102, 1799010313, 2194093370, 2632344667, 2641553256, 2779594451, 3517203014, 3543799498, 3837503950, 4283091697},
    		Values:  []float32{2.6875, 4.2929688, 3.609375, 3.0722656, 2.1152344, 5.78125, 3.7460938, 3.7363281, 1.2695312, 3.4824219, 0.7207031, 0.0826416, 4.671875, 3.7011719, 2.796875, 0.61621094},
    	}

    	metadataMap3 := map[string]interface{}{
    		"chunk_text": "AAPL's strategic Q3 partnerships with semiconductor suppliers could mitigate component risks and stabilize iPhone production",
    		"category":    "technology",
    		"quarter":     "Q3",
    	}

    	metadata3, err := structpb.NewStruct(metadataMap3)
    	if err != nil {
    		log.Fatalf("Failed to create metadata map: %v", err)
    	}

    	sparseValues4 := pinecone.SparseValues{
    		Indices: []uint32{131900689, 152217691, 441495248, 1640781426, 1851149807, 2263326288, 2502307765, 2641553256, 2684780967, 2966813704, 3162218338, 3283104238, 3488055477, 3530642888, 3888762515, 4152503047, 4177290673},
    		Values:  []float32{0.73046875, 0.46972656, 2.84375, 5.2265625, 3.3242188, 1.9863281, 0.9511719, 0.5019531, 4.4257812, 3.4277344, 0.41308594, 4.3242188, 2.4179688, 3.1757812, 1.0224609, 2.0585938, 2.5859375},
    	}

    	metadataMap4 := map[string]interface{}{
    		"chunk_text": "AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space.",
    		"category":    "technology",
    		"quarter":     "Q4",
    	}

    	metadata4, err := structpb.NewStruct(metadataMap4)
    	if err != nil {
    		log.Fatalf("Failed to create metadata map: %v", err)
    	}

    	vectors := []*pinecone.Vector{
    		{
    			Id:           "vec1",
    			SparseValues: &sparseValues1,
    			Metadata:     metadata1,
    		},
    		{
    			Id:           "vec2",
    			SparseValues: &sparseValues2,
    			Metadata:     metadata2,
    		},
    		{
    			Id:           "vec3",
    			SparseValues: &sparseValues3,
    			Metadata:     metadata3,
    		},
    		{
    			Id:           "vec4",
    			SparseValues: &sparseValues4,
    			Metadata:     metadata4,
    		},
    	}

    	count, err := idxConnection.UpsertVectors(ctx, vectors)
    	if err != nil {
    		log.Fatalf("Failed to upsert vectors: %v", err)
    	} else {
    		fmt.Printf("Successfully upserted %d vector(s)!\n", count)
    	}
    }
    ```

```csharp
    using Pinecone;

    var pinecone = new PineconeClient("YOUR_API_KEY");

    var index = pinecone.Index("docs-example");

    var vector1 = new Vector
    {
        Id = "vec1",
        SparseValues = new SparseValues
        {
            Indices = new uint[] { 822745112, 1009084850, 1221765879, 1408993854, 1504846510, 1596856843, 1640781426, 1656251611, 1807131503, 2543655733, 2902766088, 2909307736, 3246437992, 3517203014, 3590924191 },
            Values = new ReadOnlyMemory<float>([1.7958984f, 0.41577148f, 2.828125f, 2.8027344f, 2.8691406f, 1.6533203f, 5.3671875f, 1.3046875f, 0.49780273f, 0.5722656f, 2.71875f, 3.0820312f, 2.5019531f, 4.4414062f, 3.3554688f])
        },
        Metadata = new Metadata {
            ["chunk_text"] = new("AAPL reported a year-over-year revenue increase, expecting stronger Q3 demand for its flagship phones."),
            ["category"] = new("technology"),
            ["quarter"] = new("Q3"),
        },
    };

    var vector2 = new Vector
    {
        Id = "vec2",
        SparseValues = new SparseValues
        {
            Indices = new uint[] { 131900689, 592326839, 710158994, 838729363, 1304885087, 1640781426, 1690623792, 1807131503, 2066971792, 2428553208, 2548600401, 2577534050, 3162218338, 3319279674, 3343062801, 3476647774, 3485013322, 3517203014, 4283091697 },
            Values = new ReadOnlyMemory<float>([0.4362793f, 3.3457031f, 2.7714844f, 3.0273438f, 3.3164062f, 5.6015625f, 2.4863281f, 0.38134766f, 1.25f, 2.9609375f, 0.34179688f, 1.4306641f, 0.34375f, 3.3613281f, 1.4404297f, 2.2558594f, 2.2597656f, 4.8710938f, 0.5605469f])
        },
        Metadata = new Metadata {
            ["chunk_text"] = new("Analysts suggest that AAPL'\''s upcoming Q4 product launch event might solidify its position in the premium smartphone market."),
            ["category"] = new("technology"),
            ["quarter"] = new("Q4"),
        },
    };

    var vector3 = new Vector
    {
        Id = "vec3",
        SparseValues = new SparseValues
        {
            Indices = new uint[] { 8661920, 350356213, 391213188, 554637446, 1024951234, 1640781426, 1780689102, 1799010313, 2194093370, 2632344667, 2641553256, 2779594451, 3517203014, 3543799498, 3837503950, 4283091697 },
            Values = new ReadOnlyMemory<float>([2.6875f, 4.2929688f, 3.609375f, 3.0722656f, 2.1152344f, 5.78125f, 3.7460938f, 3.7363281f, 1.2695312f, 3.4824219f, 0.7207031f, 0.0826416f, 4.671875f, 3.7011719f, 2.796875f, 0.61621094f])
        },
        Metadata = new Metadata {
            ["chunk_text"] = new("AAPL'\''s strategic Q3 partnerships with semiconductor suppliers could mitigate component risks and stabilize iPhone production"),
            ["category"] = new("technology"),
            ["quarter"] = new("Q3"),
        },    
    };

    var vector4 = new Vector
    {
        Id = "vec4",
        SparseValues = new SparseValues
        {
            Indices = new uint[] { 131900689, 152217691, 441495248, 1640781426, 1851149807, 2263326288, 2502307765, 2641553256, 2684780967, 2966813704, 3162218338, 3283104238, 3488055477, 3530642888, 3888762515, 4152503047, 4177290673 },
            Values = new ReadOnlyMemory<float>([0.73046875f, 0.46972656f, 2.84375f, 5.2265625f, 3.3242188f, 1.9863281f, 0.9511719f, 0.5019531f, 4.4257812f, 3.4277344f, 0.41308594f, 4.3242188f, 2.4179688f, 3.1757812f, 1.0224609f, 2.0585938f, 2.5859375f])
        },
        Metadata = new Metadata {
            ["chunk_text"] = new("AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space."),
            ["category"] = new("technology"),
            ["quarter"] = new("Q4"),
        },
    };

    // Upsert vector
    Console.WriteLine("Upserting vector...");
    var upsertResponse = await index.UpsertAsync(new UpsertRequest
    {
        Vectors = new List<Vector> { vector1, vector2, vector3, vector4 },
        Namespace = "example-namespace"
    });
    Console.WriteLine($"Upserted {upsertResponse.UpsertedCount} vector");
    ```

```shell
    INDEX_HOST="INDEX_HOST"
    PINECONE_API_KEY="YOUR_API_KEY"

    curl "http://$INDEX_HOST/vectors/upsert" \
      -H "Content-Type: application/json" \
      -H "Api-Key: $PINECONE_API_KEY" \
      -H "X-Pinecone-Api-Version: 2025-10" \
      -d '{
            "namespace": "example-namespace",
            "vectors": [
                {
                    "id": "vec1",
                    "sparseValues": {
                        "values": [1.7958984, 0.41577148, 2.828125, 2.8027344, 2.8691406, 1.6533203, 5.3671875, 1.3046875, 0.49780273, 0.5722656, 2.71875, 3.0820312, 2.5019531, 4.4414062, 3.3554688],
                        "indices": [822745112, 1009084850, 1221765879, 1408993854, 1504846510, 1596856843, 1640781426, 1656251611, 1807131503, 2543655733, 2902766088, 2909307736, 3246437992, 3517203014, 3590924191]
                    },
                    "metadata": {
                        "chunk_text": "AAPL reported a year-over-year revenue increase, expecting stronger Q3 demand for its flagship phones.",
                        "category": "technology",
                        "quarter": "Q3"
                    }
                },
                {
                    "id": "vec2",
                    "sparseValues": {
                        "values": [0.4362793, 3.3457031, 2.7714844, 3.0273438, 3.3164062, 5.6015625, 2.4863281, 0.38134766, 1.25, 2.9609375, 0.34179688, 1.4306641, 0.34375, 3.3613281, 1.4404297, 2.2558594, 2.2597656, 4.8710938, 0.5605469],
                        "indices": [131900689, 592326839, 710158994, 838729363, 1304885087, 1640781426, 1690623792, 1807131503, 2066971792, 2428553208, 2548600401, 2577534050, 3162218338, 3319279674, 3343062801, 3476647774, 3485013322, 3517203014, 4283091697]
                    },
                    "metadata": {
                        "chunk_text": "Analysts suggest that AAPL'\''s upcoming Q4 product launch event might solidify its position in the premium smartphone market.",
                        "category": "technology",
                        "quarter": "Q4"
                    }
                },
                {
                    "id": "vec3",
                    "sparseValues": {
                        "values": [2.6875, 4.2929688, 3.609375, 3.0722656, 2.1152344, 5.78125, 3.7460938, 3.7363281, 1.2695312, 3.4824219, 0.7207031, 0.0826416, 4.671875, 3.7011719, 2.796875, 0.61621094],
                        "indices": [8661920, 350356213, 391213188, 554637446, 1024951234, 1640781426, 1780689102, 1799010313, 2194093370, 2632344667, 2641553256, 2779594451, 3517203014, 3543799498, 3837503950, 4283091697]
                    },
                    "metadata": {
                        "chunk_text": "AAPL'\''s strategic Q3 partnerships with semiconductor suppliers could mitigate component risks and stabilize iPhone production",
                        "category": "technology",
                        "quarter": "Q3"
                    }
                },
                {
                    "id": "vec4",
                    "sparseValues": {
                        "values": [0.73046875, 0.46972656, 2.84375, 5.2265625, 3.3242188, 1.9863281, 0.9511719, 0.5019531, 4.4257812, 3.4277344, 0.41308594, 4.3242188, 2.4179688, 3.1757812, 1.0224609, 2.0585938, 2.5859375],
                        "indices": [131900689, 152217691, 441495248, 1640781426, 1851149807, 2263326288, 2502307765, 2641553256, 2684780967, 2966813704, 3162218338, 3283104238, 3488055477, 3530642888, 3888762515, 4152503047, 4177290673]
                    },
                    "metadata": {
                        "chunk_text": "AAPL may consider healthcare integrations in Q4 to compete with tech rivals entering the consumer wellness space.",
                        "category": "technology",
                        "quarter": "Q4"
                    }
                },
            ]
        }'
    ```

<span class="tab-end"></span>
<span class="tab-group-end"></span>

## Upsert in batches

<span class="callout-start" data-callout-type="tip"></span>
To control costs when ingesting large datasets (10,000,000+ records), use [import](/guides/index-data/import-data) instead of upsert.
<span class="callout-end"></span>

Send upserts in batches to help increase throughput.

* When upserting records with vectors, a batch should be as large as possible (up to 1000 records) without exceeding the [max request size of 2 MB](#upsert-limits).

To understand the number of records you can fit into one batch based on the vector dimensions and metadata size, see the following table:

| Dimension | Metadata (bytes) | Max batch size |
| :-------- | :--------------- | :------------- |
| 386       | 0                | 1000           |
| 768       | 500              | 559            |
| 1536      | 2000             | 245            |

* When upserting records with text, a batch can contain up to 96 records. This limit comes from the [hosted embedding models](/guides/index-data/create-an-index#embedding-models) used during integrated embedding rather than the batch size limit for upserting raw vectors.


```Python
import random
import itertools
from pinecone.grpc import PineconeGRPC as Pinecone

pc = Pinecone(api_key="YOUR_API_KEY")

# To get the unique host for an index, 
# see https://docs.pinecone.io/guides/manage-data/target-an-index
index = pc.Index(host="INDEX_HOST")

def chunks(iterable, batch_size=200):
    """A helper function to break an iterable into chunks of size batch_size."""
    it = iter(iterable)
    chunk = tuple(itertools.islice(it, batch_size))
    while chunk:
        yield chunk
        chunk = tuple(itertools.islice(it, batch_size))

vector_dim = 128
vector_count = 10000

# Example generator that generates many (id, vector) pairs
example_data_generator = map(lambda i: (f'id-{i}', [random.random() for _ in range(vector_dim)]), range(vector_count))

# Upsert data with 200 vectors per upsert request
for ids_vectors_chunk in chunks(example_data_generator, batch_size=200):
    index.upsert(vectors=ids_vectors_chunk)

import { Pinecone } from "@pinecone-database/pinecone";

const RECORD_COUNT = 10000;
const RECORD_DIMENSION = 128;

const client = new Pinecone({ apiKey: "YOUR_API_KEY" });
const index = client.index("docs-example");

// A helper function that breaks an array into chunks of size batchSize
const chunks = (array, batchSize = 200) => {
  const chunks = [];

  for (let i = 0; i < array.length; i += batchSize) {
    chunks.push(array.slice(i, i + batchSize));
  }

  return chunks;
};

// Example data generation function, creates many (id, vector) pairs
const generateExampleData = () =>
  Array.from({ length: RECORD_COUNT }, (_, i) => {
    return {
      id: `id-${i}`,
      values: Array.from({ length: RECORD_DIMENSION }, (_, i) => Math.random()),
    };
  });

const exampleRecordData = generateExampleData();
const recordChunks = chunks(exampleRecordData);

// Upsert data with 200 records per upsert request
for (const chunk of recordChunks) {
  await index.upsert(chunk)
}

import io.pinecone.clients.Index;
import io.pinecone.configs.PineconeConfig;
import io.pinecone.configs.PineconeConnection;
import io.pinecone.unsigned_indices_model.VectorWithUnsignedIndices;

import java.util.Arrays;
import java.util.List;

public class UpsertBatchExample  {
    public static void main(String[] args) {
        PineconeConfig config = new PineconeConfig("YOUR_API_KEY");
        // To get the unique host for an index, 
        // see https://docs.pinecone.io/guides/manage-data/target-an-index
        config.setHost("INDEX_HOST");
        PineconeConnection connection = new PineconeConnection(config);
        Index index = new Index(connection, "INDEX_NAME");

        ArrayList<VectorWithUnsignedIndices> vectors = generateVectors();
        ArrayList<ArrayList<VectorWithUnsignedIndices>> chunks = chunks(vectors, BATCH_SIZE);

        for (ArrayList<VectorWithUnsignedIndices> chunk : chunks) {
            index.upsert(chunk, "example-namespace");
        }
    }

    // A helper function that breaks an ArrayList into chunks of batchSize
    private static ArrayList<ArrayList<VectorWithUnsignedIndices>> chunks(ArrayList<VectorWithUnsignedIndices> vectors, int batchSize) {
        ArrayList<ArrayList<VectorWithUnsignedIndices>> chunks = new ArrayList<>();
        ArrayList<VectorWithUnsignedIndices> chunk = new ArrayList<>();

        for (int i = 0; i < vectors.size(); i++) {
            if (i % BATCH_SIZE == 0 && i != 0) {
                chunks.add(chunk);
                chunk = new ArrayList<>();
            }

            chunk.add(vectors.get(i));
        }

        return chunks;
    }

    // Example data generation function, creates many (id, vector) pairs
    private static ArrayList<VectorWithUnsignedIndices> generateVectors() {
        Random random = new Random();
        ArrayList<VectorWithUnsignedIndices> vectors = new ArrayList<>();


        for (int i = 0; i <= RECORD_COUNT; i++) {
            String id = "id-" + i;
            ArrayList<Float> values = new ArrayList<>();

            for (int j = 0; j < RECORD_DIMENSION; j++) {
                values.add(random.nextFloat());
            }

            VectorWithUnsignedIndices vector = new VectorWithUnsignedIndices();
            vector.setId(id);
            vector.setValues(values);
            vectors.add(vector);
        }

        return vectors;
    }
}

package main

import (
    "context"
    "fmt"
    "log"

    "github.com/pinecone-io/go-pinecone/v4/pinecone"
)

func main() {
    ctx := context.Background()

    pc, err := pinecone.NewClient(pinecone.NewClientParams{
        ApiKey: "YOUR_API_KEY",
    })
    if err != nil {
        log.Fatalf("Failed to create Client: %v", err)
    }

    // To get the unique host for an index, 
    // see https://docs.pinecone.io/guides/manage-data/target-an-index
    idxConnection, err := pc.Index(pinecone.NewIndexConnParams{Host: "INDEX_HOST"})
    if err != nil {
        log.Fatalf("Failed to create IndexConnection for Host: %v", err)
	  }

    // Generate a large number of vectors to upsert
    vectorCount := 10000
    vectorDim := idx.Dimension

    vectors := make([]*pinecone.Vector, vectorCount)
    for i := 0; i < int(vectorCount); i++ {
        randomFloats := make([]float32, vectorDim)

        for i := int32(0); i < vectorDim; i++ {
            randomFloats[i] = rand.Float32()
        }

        vectors[i] = &pinecone.Vector{
            Id:     fmt.Sprintf("doc1#-vector%d", i),
            Values: randomFloats,
        }
    }

    // Break the vectors into batches of 200
    var batches [][]*pinecone.Vector
    batchSize := 200

    for len(vectors) > 0 {
        batchEnd := batchSize
        if len(vectors) < batchSize {
            batchEnd = len(vectors)
        }
        batches = append(batches, vectors[:batchEnd])
        vectors = vectors[batchEnd:]
    }

    // Upsert batches
    for i, batch := range batches {
        upsertResp, err := idxConn.UpsertVectors(context.Background(), batch)
        if err != nil {
            panic(err)
        }

        fmt.Printf("upserted %d vectors (%v of %v batches)\n", upsertResp, i+1, len(batches))
    }
}

Upsert in parallel#

Python SDK v6.0.0 and later provide async methods for use with asyncio. Asyncio support makes it possible to use Pinecone with modern async web frameworks such as FastAPI, Quart, and Sanic. For more details, see Async requests.

Send multiple upserts in parallel to help increase throughput. Vector operations block until the response has been received. However, they can be made asynchronously as follows:

# This example uses `async_req=True` and multiple threads.
# For a single-threaded approach compatible with modern async web frameworks, 
# see https://docs.pinecone.io/reference/sdks/python/overview#async-requests
import random
import itertools
from pinecone import Pinecone

# Initialize the client with pool_threads=30. This limits simultaneous requests to 30.
pc = Pinecone(api_key="YOUR_API_KEY", pool_threads=30)

# To get the unique host for an index, 
# see https://docs.pinecone.io/guides/manage-data/target-an-index
index = pc.Index(host="INDEX_HOST")

def chunks(iterable, batch_size=200):
    """A helper function to break an iterable into chunks of size batch_size."""
    it = iter(iterable)
    chunk = tuple(itertools.islice(it, batch_size))
    while chunk:
        yield chunk
        chunk = tuple(itertools.islice(it, batch_size))

vector_dim = 128
vector_count = 10000

example_data_generator = map(lambda i: (f'id-{i}', [random.random() for _ in range(vector_dim)]), range(vector_count))

# Upsert data with 200 vectors per upsert request asynchronously
# - Pass async_req=True to index.upsert()
with pc.Index(host="INDEX_HOST", pool_threads=30) as index:
    # Send requests in parallel
    async_results = [
        index.upsert(vectors=ids_vectors_chunk, async_req=True)
        for ids_vectors_chunk in chunks(example_data_generator, batch_size=200)
    ]
    # Wait for and retrieve responses (this raises in case of error)
    [async_result.get() for async_result in async_results]

import { Pinecone } from "@pinecone-database/pinecone";

const RECORD_COUNT = 10000;
const RECORD_DIMENSION = 128;

const client = new Pinecone({ apiKey: "YOUR_API_KEY" });

// To get the unique host for an index, 
// see https://docs.pinecone.io/guides/manage-data/target-an-index
const index = pc.index("INDEX_NAME", "INDEX_HOST")

// A helper function that breaks an array into chunks of size batchSize
const chunks = (array, batchSize = 200) => {
  const chunks = [];

  for (let i = 0; i < array.length; i += batchSize) {
    chunks.push(array.slice(i, i + batchSize));
  }

  return chunks;
};

// Example data generation function, creates many (id, vector) pairs
const generateExampleData = () =>
  Array.from({ length: RECORD_COUNT }, (_, i) => {
    return {
      id: `id-${i}`,
      values: Array.from({ length: RECORD_DIMENSION }, (_, i) => Math.random()),
    };
  });

const exampleRecordData = generateExampleData();
const recordChunks = chunks(exampleRecordData);

// Upsert data with 200 records per request asynchronously using Promise.all()
await Promise.all(recordChunks.map((chunk) => index.upsert(chunk)));

import com.google.protobuf.Struct;
import com.google.protobuf.Value;
import io.pinecone.clients.Index;
import io.pinecone.configs.PineconeConfig;
import io.pinecone.configs.PineconeConnection;
import io.pinecone.proto.UpsertResponse;
import io.pinecone.unsigned_indices_model.VectorWithUnsignedIndices;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.List;

public class UpsertExample {
    public static void main(String[] args) {
        PineconeConfig config = new PineconeConfig("YOUR_API_KEY");
        // To get the unique host for an index, 
        // see https://docs.pinecone.io/guides/manage-data/target-an-index
        config.setHost("INDEX_HOST");
        PineconeConnection connection = new PineconeConnection(config);
        Index index = new Index(connection, "INDEX_NAME");

        // Run 5 threads concurrently and upsert data into pinecone
        int numberOfThreads = 5;

        // Create a fixed thread pool
        ExecutorService executor = Executors.newFixedThreadPool(numberOfThreads);

        // Submit tasks to the executor
        for (int i = 0; i < numberOfThreads; i++) {
            // upsertData
            int batchNumber = i+1;
            executor.submit(() -> upsertData(index, batchNumber));
        }

        // Shutdown the executor
        executor.shutdown();
    }

    private static void upsertData(Index index, int batchNumber) {
        // Vector ids to be upserted
        String prefix = "v" + batchNumber;
        List<String> upsertIds = Arrays.asList(prefix + "_1", prefix + "_2", prefix + "_3");

        // List of values to be upserted
        List<List<Float>> values = new ArrayList<>();
        values.add(Arrays.asList(1.0f, 2.0f, 3.0f));
        values.add(Arrays.asList(4.0f, 5.0f, 6.0f));
        values.add(Arrays.asList(7.0f, 8.0f, 9.0f));

        // List of sparse indices to be upserted
        List<List<Long>> sparseIndices = new ArrayList<>();
        sparseIndices.add(Arrays.asList(1L, 2L, 3L));
        sparseIndices.add(Arrays.asList(4L, 5L, 6L));
        sparseIndices.add(Arrays.asList(7L, 8L, 9L));

        // List of sparse values to be upserted
        List<List<Float>> sparseValues = new ArrayList<>();
        sparseValues.add(Arrays.asList(1000f, 2000f, 3000f));
        sparseValues.add(Arrays.asList(4000f, 5000f, 6000f));
        sparseValues.add(Arrays.asList(7000f, 8000f, 9000f));

        List<VectorWithUnsignedIndices> vectors = new ArrayList<>(3);

        // Metadata to be upserted
        Struct metadataStruct1 = Struct.newBuilder()
                .putFields("genre", Value.newBuilder().setStringValue("action").build())
                .putFields("year", Value.newBuilder().setNumberValue(2019).build())
                .build();

        Struct metadataStruct2 = Struct.newBuilder()
                .putFields("genre", Value.newBuilder().setStringValue("thriller").build())
                .putFields("year", Value.newBuilder().setNumberValue(2020).build())
                .build();

        Struct metadataStruct3 = Struct.newBuilder()
                .putFields("genre", Value.newBuilder().setStringValue("comedy").build())
                .putFields("year", Value.newBuilder().setNumberValue(2021).build())
                .build();
        List<Struct> metadataStructList = Arrays.asList(metadataStruct1, metadataStruct2, metadataStruct3);

        // Upsert data
        for (int i = 0; i < metadataStructList.size(); i++) {
            vectors.add(buildUpsertVectorWithUnsignedIndices(upsertIds.get(i), values.get(i), sparseIndices.get(i), sparseValues.get(i), metadataStructList.get(i)));
        }

        UpsertResponse upsertResponse = index.upsert(vectors, "example-namespace");
    }
}

package main

import (
    "context"
    "fmt"
    "log"
    "math/rand"
    "sync"
    
    "github.com/pinecone-io/go-pinecone/v4/pinecone"
)

func main() {
    ctx := context.Background()

    pc, err := pinecone.NewClient(pinecone.NewClientParams{
        ApiKey: "YOUR_API_KEY",
    })
    if err != nil {
        log.Fatalf("Failed to create Client: %v", err)
    }

    // To get the unique host for an index, 
    // see https://docs.pinecone.io/guides/manage-data/target-an-index
    idxConn, err := pc.Index(pinecone.NewIndexConnParams{Host: "INDEX_HOST"})
    if err != nil {
        log.Fatalf("Failed to create IndexConnection for Host: %v", err)
	  }

    // Generate a large number of vectors to upsert
    vectorCount := 10000
    vectorDim := idx.Dimension

    vectors := make([]*pinecone.Vector, vectorCount)
    for i := 0; i < int(vectorCount); i++ {
        randomFloats := make([]float32, vectorDim)

        for i := int32(0); i < vectorDim; i++ {
            randomFloats[i] = rand.Float32()
        }

        vectors[i] = &pinecone.Vector{
            Id:     fmt.Sprintf("doc1#-vector%d", i),
            Values: randomFloats,
        }
    }

    // Break the vectors into batches of 200
    var batches [][]*pinecone.Vector
    batchSize := 200

    for len(vectors) > 0 {
        batchEnd := batchSize
        if len(vectors) < batchSize {
            batchEnd = len(vectors)
        }
        batches = append(batches, vectors[:batchEnd])
        vectors = vectors[batchEnd:]
    }

    // Use channels to manage concurrency and possible errors
    maxConcurrency := 10
    errChan := make(chan error, len(batches))
    semaphore := make(chan struct{}, maxConcurrency)
    var wg sync.WaitGroup

    for i, batch := range batches {
        wg.Add(1)
        semaphore <- struct{}{}

        go func(batch []*pinecone.Vector, i int) {
            defer wg.Done()
            defer func() { <-semaphore }()

            upsertResp, err := idxConn.UpsertVectors(context.Background(), batch)
            if err != nil {
                errChan <- fmt.Errorf("batch %d failed: %v", i, err)
                return
            }

            fmt.Printf("upserted %d vectors (%v of %v batches)\n", upsertResp, i+1, len(batches))
        }(batch, i)
    }

    wg.Wait()
    close(errChan)

    for err := range errChan {
        if err != nil {
            fmt.Printf("Error while upserting batch: %v\n", err)
        }
    }
}

Python SDK with gRPC#

Using the Python SDK with gRPC extras can provide higher upsert speeds. Through multiplexing, gRPC is able to handle large amounts of requests in parallel without slowing down the rest of the system (HoL blocking), unlike REST. Moreover, you can pass various retry strategies to the gRPC SDK, including exponential backoff.

To install the gRPC version of the SDK:

pip install "pinecone[grpc]"

To use the gRPC SDK, import the pinecone.grpc subpackage and target an index as usual:

from pinecone.grpc import PineconeGRPC as Pinecone

# This is gRPC client aliased as "Pinecone"
pc = Pinecone(api_key='YOUR_API_KEY')  

# To get the unique host for an index, 
# see https://docs.pinecone.io/guides/manage-data/target-an-index
index = pc.Index(host="INDEX_HOST")

To launch multiple read and write requests in parallel, pass async_req to the upsert operation:

def chunker(seq, batch_size):
  return (seq[pos:pos + batch_size] for pos in range(0, len(seq), batch_size))

async_results = [
  index.upsert(vectors=chunk, async_req=True)
  for chunk in chunker(data, batch_size=200)
]

# Wait for and retrieve responses (in case of error)
[async_result.result() for async_result in async_results]

It is possible to get write-throttled faster when upserting using the gRPC SDK. If you see this often, implement retry logic with exponential backoff while upserting.

The syntax for upsert, query, fetch, and delete with the gRPC SDK remain the same as the standard SDK.

Upsert limits#

Metric	Limit
Max batch size	2 MB or 1000 records with vectors 96 records with text
Max metadata size per record	40 KB
Max length for a record ID	512 characters
Max dimensionality for dense vectors	20,000
Max non-zero values for sparse vectors	2048
Max dimensionality for sparse vectors	4.2 billion

Link last verified June 7, 2026. View original ↗

Source: Pinecone Docs

Link last verified: 2026-02-26