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

# Rerank

> Rerank endpoints

## Overview

Rerank endpoints

### Available Operations

* [rerank](#rerank) - Submit a rerank request

## rerank

Submits a rerank request to the rerank router

### Example Usage

```python theme={null}
from openrouter import OpenRouter
import os


with OpenRouter(
    http_referer="<value>",
    x_open_router_title="<value>",
    x_open_router_categories="<value>",
    api_key=os.getenv("OPENROUTER_API_KEY", ""),
) as open_router:

    res = open_router.rerank.rerank(documents=[
        "Paris is the capital of France.",
        "Berlin is the capital of Germany.",
    ], model="cohere/rerank-v3.5", query="What is the capital of France?")

    # Handle response
    print(res)

```

### Parameters

| Parameter                  | Type                                                                                           | Required             | Description                                                                                                                                                 | Example                                                                                    |
| -------------------------- | ---------------------------------------------------------------------------------------------- | -------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------ |
| `documents`                | List\[[operations.Document](../../operations/document.mdx)]                                    | :heavy\_check\_mark: | The list of documents to rerank. Documents may be plain strings, or structured objects with `text` and/or `image` for multimodal models.                    | \[<br />"Paris is the capital of France.",<br />"Berlin is the capital of Germany."<br />] |
| `model`                    | *str*                                                                                          | :heavy\_check\_mark: | The rerank model to use                                                                                                                                     | cohere/rerank-v3.5                                                                         |
| `query`                    | *str*                                                                                          | :heavy\_check\_mark: | The search query to rerank documents against                                                                                                                | What is the capital of France?                                                             |
| `http_referer`             | *Optional\[str]*                                                                               | :heavy\_minus\_sign: | The app identifier should be your app's URL and is used as the primary identifier for rankings.<br />This is used to track API usage per application.<br /> |                                                                                            |
| `x_open_router_title`      | *Optional\[str]*                                                                               | :heavy\_minus\_sign: | The app display name allows you to customize how your app appears in OpenRouter's dashboard.<br />                                                          |                                                                                            |
| `x_open_router_categories` | *Optional\[str]*                                                                               | :heavy\_minus\_sign: | Comma-separated list of app categories (e.g. "cli-agent,cloud-agent"). Used for marketplace rankings.<br />                                                 |                                                                                            |
| `provider`                 | [OptionalNullable\[components.ProviderPreferences\]](../../components/providerpreferences.mdx) | :heavy\_minus\_sign: | N/A                                                                                                                                                         | \{<br />"allow\_fallbacks": true<br />}                                                    |
| `top_n`                    | *Optional\[int]*                                                                               | :heavy\_minus\_sign: | Number of most relevant documents to return                                                                                                                 | 3                                                                                          |
| `retries`                  | [Optional\[utils.RetryConfig\]](../../models/utils/retryconfig.mdx)                            | :heavy\_minus\_sign: | Configuration to override the default retry behavior of the client.                                                                                         |                                                                                            |

### Response

**[operations.CreateRerankResponse](../../operations/creatererankresponse.mdx)**

### Errors

| Error Type                             | Status Code | Content Type     |
| -------------------------------------- | ----------- | ---------------- |
| errors.BadRequestResponseError         | 400         | application/json |
| errors.UnauthorizedResponseError       | 401         | application/json |
| errors.PaymentRequiredResponseError    | 402         | application/json |
| errors.ForbiddenResponseError          | 403         | application/json |
| errors.NotFoundResponseError           | 404         | application/json |
| errors.PayloadTooLargeResponseError    | 413         | application/json |
| errors.TooManyRequestsResponseError    | 429         | application/json |
| errors.InternalServerResponseError     | 500         | application/json |
| errors.BadGatewayResponseError         | 502         | application/json |
| errors.ServiceUnavailableResponseError | 503         | application/json |
| errors.EdgeNetworkTimeoutResponseError | 524         | application/json |
| errors.ProviderOverloadedResponseError | 529         | application/json |
| errors.OpenRouterDefaultError          | 4XX, 5XX    | \*/\*            |