> ## 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.

# ChatStreamOptions

Streaming configuration options

## Fields

| Field | Type | Required | Description | Example |
| - | - | - | - | - |
| ~~`IncludeUsage`~~ | `*bool` | :heavy\_minus\_sign: | : warning: \*\* DEPRECATED \*\*: This will be removed in a future release, please migrate away from it as soon as possible.<br /><br />Deprecated: This field has no effect. Full usage details are always included. | true |