# Rerank results

For guidance and examples, see [Rerank results](/guides/index-data-search-rerank-results).

:::code-group
```python Python
from pinecone.grpc import PineconeGRPC as Pinecone

pc = Pinecone(api_key="YOUR_API_KEY")

result = pc.inference.rerank(
    model="bge-reranker-v2-m3",
    query="The tech company Apple is known for its innovative products like the iPhone.",
    documents=[
        {"id": "vec1", "text": "Apple is a popular fruit known for its sweetness and crisp texture."},
        {"id": "vec2", "text": "Many people enjoy eating apples as a healthy snack."},
        {"id": "vec3", "text": "Apple Inc. has revolutionized the tech industry with its sleek designs and user-friendly interfaces."},
        {"id": "vec4", "text": "An apple a day keeps the doctor away, as the saying goes."},
    ],
    top_n=4,
    return_documents=True,
    parameters={
        "truncate": "END"
    }
)

print(result)
```

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

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

const rerankingModel = 'bge-reranker-v2-m3';

const query = 'The tech company Apple is known for its innovative products like the iPhone.';

const documents = [
  { id: 'vec1', text: 'Apple is a popular fruit known for its sweetness and crisp texture.' },
  { id: 'vec2', text: 'Many people enjoy eating apples as a healthy snack.' },
  { id: 'vec3', text: 'Apple Inc. has revolutionized the tech industry with its sleek designs and user-friendly interfaces.' },
  { id: 'vec4', text: 'An apple a day keeps the doctor away, as the saying goes.' },
];

const rerankOptions = {
  topN: 4,
  returnDocuments: true,
  parameters: {
    truncate: 'END'
  }, 
};

const response = await pc.inference.rerank(
  rerankingModel,
  query,
  documents,
  rerankOptions
);

console.log(response);
```

```java Java
import io.pinecone.clients.Inference;
import io.pinecone.clients.Pinecone;
import org.openapitools.inference.client.model.RerankResult;
import org.openapitools.inference.client.ApiException;

import java.util.*;

public class RerankExample {
    public static void main(String[] args) throws ApiException {
        Pinecone pc = new Pinecone.Builder("YOUR_API_KEY").build();
        Inference inference = pc.getInferenceClient();

        // The model to use for reranking
        String model = "bge-reranker-v2-m3";

        // The query to rerank documents against
        String query = "The tech company Apple is known for its innovative products like the iPhone.";

        // Add the documents to rerank
        List<Map<String, Object>> documents = new ArrayList<>();
        Map<String, Object> doc1 = new HashMap<>();
        doc1.put("id", "vec1");
        doc1.put("text", "Apple is a popular fruit known for its sweetness and crisp texture.");
        documents.add(doc1);

        Map<String, Object> doc2 = new HashMap<>();
        doc2.put("id", "vec2");
        doc2.put("text", "Many people enjoy eating apples as a healthy snack.");
        documents.add(doc2);

        Map<String, Object> doc3 = new HashMap<>();
        doc3.put("id", "vec3");
        doc3.put("text", "Apple Inc. has revolutionized the tech industry with its sleek designs and user-friendly interfaces.");
        documents.add(doc3);

        Map<String, Object> doc4 = new HashMap<>();
        doc4.put("id", "vec4");
        doc4.put("text", "An apple a day keeps the doctor away, as the saying goes.");
        documents.add(doc4);

        // The fields to rank the documents by. If not provided, the default is "text"
        List<String> rankFields = Arrays.asList("text");

        // The number of results to return sorted by relevance. Defaults to the number of inputs
        int topN = 4;

        // Whether to return the documents in the response
        boolean returnDocuments = true;

        // Additional model-specific parameters for the reranker
        Map<String, Object> parameters = new HashMap<>();
        parameters.put("truncate", "END");

        // Send ranking request
        RerankResult result = inference.rerank(model, query, documents, rankFields, topN, returnDocuments, parameters);

        // Get ranked data
        System.out.println(result.getData());
    }
}
```

```go Go
package main

import (
    "context"
    "fmt"
    "log"

    "github.com/pinecone-io/go-pinecone/v3/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)
    }

    rerankModel := "bge-reranker-v2-m3"
    topN := 4
    returnDocuments := true
    documents := []pinecone.Document{
        {"id": "vec1", "text": "Apple is a popular fruit known for its sweetness and crisp texture."},
        {"id": "vec2", "text": "Many people enjoy eating apples as a healthy snack."},
        {"id": "vec3", "text": "Apple Inc. has revolutionized the tech industry with its sleek designs and user-friendly interfaces."},
        {"id": "vec4", "text": "An apple a day keeps the doctor away, as the saying goes."},
    }

    ranking, err := pc.Inference.Rerank(ctx, &pinecone.RerankRequest{
        Model:           rerankModel,
        Query:           "The tech company Apple is known for its innovative products like the iPhone.",
        ReturnDocuments: &returnDocuments,
        TopN:            &topN,
        RankFields:      &[]string{"text"},
        Documents:       documents,
    })
    if err != nil {
        log.Fatalf("Failed to rerank: %v", err)
    }
    fmt.Printf("Rerank result: %+v\n", ranking)
}
```

```csharp C#
using Pinecone;

var pinecone = new PineconeClient("YOUR_API_KEY");

// The model to use for reranking
var model = "bge-reranker-v2-m3";

// The query to rerank documents against
var query = "The tech company Apple is known for its innovative products like the iPhone.";

// Add the documents to rerank
var documents = new List<Dictionary<string, object>>
{
    new()
    {
        ["id"] = "vec1",
        ["my_field"] = "Apple is a popular fruit known for its sweetness and crisp texture."
    },
    new()
    {
        ["id"] = "vec2",
        ["my_field"] = "Many people enjoy eating apples as a healthy snack."
    },
    new()
    {
        ["id"] = "vec3",
        ["my_field"] =
            "Apple Inc. has revolutionized the tech industry with its sleek designs and user-friendly interfaces."
    },
    new()
    {
        ["id"] = "vec4",
        ["my_field"] = "An apple a day keeps the doctor away, as the saying goes."
    }
};

// The fields to rank the documents by. If not provided, the default is "text"
var rankFields = new List<string> { "my_field" };

// The number of results to return sorted by relevance. Defaults to the number of inputs
int topN = 4;

// Whether to return the documents in the response
bool returnDocuments = true;

// Additional model-specific parameters for the reranker
var parameters = new Dictionary<string, object>
{
    ["truncate"] = "END"
};

// Send ranking request
var result = await pinecone.Inference.RerankAsync(
    new RerankRequest
    {
        Model = model,
        Query = query,
        Documents = documents,
        RankFields = rankFields,
        TopN = topN,
        ReturnDocuments = true,
        Parameters = parameters
    });

Console.WriteLine(result);
```

```shell curl
PINECONE_API_KEY="YOUR_API_KEY"

curl https://api.pinecone.io/rerank \
  -H "Content-Type: application/json" \
  -H "Accept: application/json" \
  -H "X-Pinecone-Api-Version: 2025-01" \
  -H "Api-Key: $PINECONE_API_KEY" \
-d '{
  "model": "bge-reranker-v2-m3",
  "query": "The tech company Apple is known for its innovative products like the iPhone.",
  "return_documents": true,
  "top_n": 4,
  "documents": [
    {"id": "vec1", "text": "Apple is a popular fruit known for its sweetness and crisp texture."},
    {"id": "vec2", "text": "Many people enjoy eating apples as a healthy snack."},
    {"id": "vec3", "text": "Apple Inc. has revolutionized the tech industry with its sleek designs and user-friendly interfaces."},
    {"id": "vec4", "text": "An apple a day keeps the doctor away, as the saying goes."}
  ],
  "parameters": {
    "truncate": "END"
  }
}'
```
:::

:::code-group
```python Python
RerankResult(
  model='bge-reranker-v2-m3',
  data=[
    {"index": 2, "score": 0.48357219,
      "document": {"id": "vec3", "text": "Apple Inc. has re..."}},
    {"index": 0, "score": 0.048405956,
      "document": {"id": "vec1", "text": "Apple is a popula..."}},
    {"index": 3, "score": 0.007846239,
      "document": {"id": "vec4", "text": "An apple a day ke..."}},
    {"index": 1, "score": 0.0006563728,
      "document": {"id": "vec2", "text": "Many people enjoy..."}}
  ],
  usage={'rerank_units': 1}
)
```

```javascript JavaScript
{
  model: 'bge-reranker-v2-m3',
  data: [
    { index: 2, score: 0.48357219, document: [Object] },
    { index: 0, score: 0.048405956, document: [Object] },
    { index: 3, score: 0.007846239, document: [Object] },
    { index: 1, score: 0.0006563728, document: [Object] }
  ],
  usage: { rerankUnits: 1 }
}
```

```java Java
[class RankedDocument {
    index: 2
    score: 0.48357219
    document: {id=vec3, text=Apple Inc. has revolutionized the tech industry with its sleek designs and user-friendly interfaces.}
    additionalProperties: null
}, class RankedDocument {
    index: 0
    score: 0.048405956
    document: {id=vec1, text=Apple is a popular fruit known for its sweetness and crisp texture.}
    additionalProperties: null
}, class RankedDocument {
    index: 3
    score: 0.007846239
    document: {id=vec4, text=An apple a day keeps the doctor away, as the saying goes.}
    additionalProperties: null
}, class RankedDocument {
    index: 1
    score: 0.0006563728
    document: {id=vec2, text=Many people enjoy eating apples as a healthy snack.}
    additionalProperties: null
}]
```

```go Go
Rerank result: {
  "data": [
    {
      "document": {
        "id": "vec3",
        "text": "Apple Inc. has revolutionized the tech industry with its sleek designs and user-friendly interfaces."
      },
      "index": 2,
      "score": 0.48357219
    },
    {
      "document": {
        "id": "vec1",
        "text": "Apple is a popular fruit known for its sweetness and crisp texture."
      },
      "index": 0,
      "score": 0.048405956
    },
    {
      "document": {
        "id": "vec4",
        "text": "An apple a day keeps the doctor away, as the saying goes."
      },
      "index": 3,
      "score": 0.007846239
    },
    {
      "document": {
        "id": "vec2",
        "text": "Many people enjoy eating apples as a healthy snack."
      },
      "index": 1,
      "score": 0.0006563728
    }
  ],
  "model": "bge-reranker-v2-m3",
  "usage": {
    "rerank_units": 1
  }
}
```

```csharp C#
{
  "model": "bge-reranker-v2-m3",
  "data": [
    {
      "index": 2,
      "score": 0.48357219,
      "document": {
        "id": "vec3",
        "my_field": "Apple Inc. has revolutionized the tech industry with its sleek designs and user-friendly interfaces."
      }
    },
    {
      "index": 0,
      "score": 0.048405956,
      "document": {
        "id": "vec1",
        "my_field": "Apple is a popular fruit known for its sweetness and crisp texture."
      }
    },
    {
      "index": 3,
      "score": 0.007846239,
      "document": {
        "id": "vec4",
        "my_field": "An apple a day keeps the doctor away, as the saying goes."
      }
    },
    {
      "index": 1,
      "score": 0.0006563728,
      "document": {
        "id": "vec2",
        "my_field": "Many people enjoy eating apples as a healthy snack."
      }
    }
  ],
  "usage": {
    "rerank_units": 1
  }
}
```

```JSON curl
{
  "data":[
    {
      "index":2,
      "document":{
        "id":"vec3",
        "text":"Apple Inc. has revolutionized the tech industry with its sleek designs and user-friendly interfaces."
      },
      "score":0.47654688
    },
    {
      "index":0,
      "document":{
        "id":"vec1",
        "text":"Apple is a popular fruit known for its sweetness and crisp texture."
      },
      "score":0.047963805
    },
    {
      "index":3,
      "document":{
        "id":"vec4",
        "text":"An apple a day keeps the doctor away, as the saying goes."
      },
      "score":0.007587992
    },
    {
      "index":1,
      "document":{
        "id":"vec2",
        "text":"Many people enjoy eating apples as a healthy snack."
      },
      "score":0.0006491712
    }
  ],
  "usage":{
    "rerank_units":1
  }
}
```
:::

`POST /rerank`

#### Authorizations

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `Api-Key` | `string` | - |  |

An API Key is required to call Pinecone APIs. Get yours from the [console](https://app.pinecone.io/).

#### Body

Rerank documents for the given query

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `model` | `string` | - | Example: bge-reranker-v2-m3 |

The [model](/guides/index-data-search-rerank-results#reranking-models) to use for reranking.

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `query` | `string` | - | The query to rerank documents against. Example: What is the capital of France? |

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `top_n?` | `integer` | - | The number of results to return sorted by relevance. Defaults to the number of inputs. Example: 5 |

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `return_documents?` | `boolean` | `true` | Whether to return the documents in the response. Example: true |

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `rank_fields?` | `string[]` | `['text']` |  |

The field(s) to consider for reranking. If not provided, the default is `["text"]`. The number of fields supported is [model-specific](/guides/index-data-search-rerank-results#reranking-models).

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `documents` | `object[]` | - | The documents to rerank. |

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `parameters?` | `object` | - |  |

Additional model-specific parameters. Refer to the [model guide](/guides/index-data-search-rerank-results#reranking-models) for available model parameters.

#### Response

`200` — OK

The result of a reranking request.

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `model` | `string` | - | The model used to rerank documents. Example: bge-reranker-v2-m3 |

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `data` | `object[]` | - | The reranked documents. |

:::accordion{title="Show child attributes"}
| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `index` | `integer` | - | The index position of the document from the original request. |

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `score` | `number` | - | The relevance of the document to the query, normalized between 0 and 1, with scores closer to 1 indicating higher relevance. Example: 0.5 |

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `document?` | `object` | - | Document for reranking |
:::

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `usage` | `object` | - | Usage statistics for the model inference. |

:::accordion{title="Show child attributes"}
| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `rerank_units?` | `integer` | - | The number of rerank units consumed by this operation. Required range: 0 <= x. Example: 1 |
:::

## Related pages

- [Account management](./account-management-index.md)
- [Admin](./admin-2-index.md)
- [Admin](./admin-index.md)
- [APIs](./apis-index.md)
- [Architecture](./architecture-index.md)
- [Bring Your Own Cloud](./bring-your-own-cloud-index.md)
- [Build an assistant](./build-an-assistant-index.md)
- [Build an integration](./build-an-integration-index.md)
- [Changelog](./changelog-index.md)
- [Changelog](../changelog.md)

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