> ## 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.

# GenerationContentData

Stored prompt and completion content

## Fields

| Field    | Type                                                                                    | Required             | Description                                                                  |
| -------- | --------------------------------------------------------------------------------------- | -------------------- | ---------------------------------------------------------------------------- |
| `input`  | [components.InputUnion](../components/inputunion.mdx)                                   | :heavy\_check\_mark: | The input to the generation — either a prompt string or an array of messages |
| `output` | [components.GenerationContentDataOutput](../components/generationcontentdataoutput.mdx) | :heavy\_check\_mark: | The output from the generation                                               |