> ## 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.

# ResponseFormat

The response format. "json" (default) returns \{ text, usage }; "verbose\_json" additionally returns task, language, duration, and segment-level timestamps (OpenAI-compatible providers only).

## Example Usage

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

let value: ResponseFormat = "verbose_json";

// Open enum: unrecognized values are captured as Unrecognized<string>
```

## Values

```typescript theme={null}
"json" | "verbose_json" | Unrecognized<string>
```