> ## 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. # ChatRequestReasoning Configuration options for reasoning models ## Example Usage ```typescript theme={null} import { ChatRequestReasoning } from "@openrouter/sdk/models"; let value: ChatRequestReasoning = {}; ``` ## Fields | Field | Type | Required | Description | Example | | --------- | ------------------------------------------------------------------------------------------- | -------------------- | --------------------------------------------------- | ------- | | `effort` | [models.ChatRequestEffort](../models/chatrequesteffort.mdx) | :heavy\_minus\_sign: | Constrains effort on reasoning for reasoning models | medium | | `summary` | [models.ChatReasoningSummaryVerbosityEnum](../models/chatreasoningsummaryverbosityenum.mdx) | :heavy\_minus\_sign: | N/A | concise |