> ## 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.OptionalNullable\[[components.MessagesOutputConfigEffort](../../models/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.OptionalNullable\[[components.MessagesOutputConfigFormat](../../models/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).                                    |                                                       |
| `TaskBudget` | optionalnullable.OptionalNullable\[[components.TaskBudget](../../models/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 />} |