> ## 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.

# MessagesOutputConfig

Configuration for controlling output behavior. Supports the effort parameter and structured output format.

## Fields

| Field | Type | Required | Description | Example |
| - | - | - | - | - |
| `effort` | [OptionalNullable\[components.MessagesOutputConfigEffort\]](../components/messagesoutputconfigeffort.mdx) | :heavy\_minus\_sign: | How much effort the model should put into its response. Higher effort levels may result in more thorough analysis but take longer. Valid values are `low`, `medium`, `high`, `xhigh`, or `max`. | medium |
| `format_` | [OptionalNullable\[components.MessagesOutputConfigFormat\]](../components/messagesoutputconfigformat.mdx) | :heavy\_minus\_sign: | A schema to specify Claude's output format in responses. See [structured outputs](https://platform.claude.com/docs/en/build-with-claude/structured-outputs). | |
| `task_budget` | [OptionalNullable\[components.TaskBudget\]](../components/taskbudget.mdx) | :heavy\_minus\_sign: | Task budget for an agentic turn. The model sees a countdown of remaining tokens and uses it to prioritize work and wind down gracefully. Advisory — does not enforce a hard cap. | \{<br />"total": 400000,<br />"type": "tokens"<br />} |