> ## 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.

# CreateRerankRequestBody

Rerank request input

## Example Usage

```typescript theme={null}
import { CreateRerankRequestBody } from "@openrouter/sdk/models/operations";

let value: CreateRerankRequestBody = {
  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?",
};
```

## Fields

| Field       | Type                                                               | Required             | Description                                                                                                                                                                                                                                                                                                             | Example                                                                                    |
| ----------- | ------------------------------------------------------------------ | -------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------ |
| `documents` | *operations.Document*\[]                                           | :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`     | *string*                                                           | :heavy\_check\_mark: | The rerank model to use                                                                                                                                                                                                                                                                                                 | cohere/rerank-v3.5                                                                         |
| `provider`  | [models.ProviderPreferences](../../models/providerpreferences.mdx) | :heavy\_minus\_sign: | N/A                                                                                                                                                                                                                                                                                                                     | \{<br />"allow\_fallbacks": true<br />}                                                    |
| `query`     | *string*                                                           | :heavy\_check\_mark: | The search query to rerank documents against                                                                                                                                                                                                                                                                            | What is the capital of France?                                                             |
| `sessionId` | *string*                                                           | :heavy\_minus\_sign: | A unique identifier for grouping related requests (e.g., a conversation or agent workflow). Used for observability grouping in Broadcast and private logging; never sent to the provider. If provided in both the request body and the x-session-id header, the body value takes precedence. Maximum of 256 characters. | session-1234                                                                               |
| `topN`      | *number*                                                           | :heavy\_minus\_sign: | Number of most relevant documents to return                                                                                                                                                                                                                                                                             | 3                                                                                          |
| `trace`     | [models.TraceConfig](../../models/traceconfig.mdx)                 | :heavy\_minus\_sign: | Metadata for observability and tracing. Known keys (trace\_id, trace\_name, span\_name, generation\_name, parent\_span\_id) have special handling. Additional keys are passed through as custom metadata to configured broadcast destinations.                                                                          | \{<br />"trace\_id": "trace-abc123",<br />"trace\_name": "my-app-trace"<br />}             |
| `user`      | *string*                                                           | :heavy\_minus\_sign: | A unique identifier representing your end-user. Forwarded to Broadcast and private logging as the end-user id; never sent to the provider.                                                                                                                                                                              | user-1234                                                                                  |