---
title: "ChatFormatGrammarConfig"
---

Custom grammar response format


## Fields

| Field                                                                                  | Type                                                                                   | Required                                                                               | Description                                                                            | Example                                                                                |
| -------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------- |
| `grammar`                                                                              | *str*                                                                                  | :heavy_check_mark:                                                                     | Custom grammar for text generation                                                     | root ::= "yes" \| "no"                                                                 |
| `type`                                                                                 | [components.ChatFormatGrammarConfigType](../components/chatformatgrammarconfigtype.mdx) | :heavy_check_mark:                                                                     | N/A                                                                                    |                                                                                        |