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openrouter-python-sdk-retry…/docs/components/chatstreamingmessagechunk.md
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ChatStreamingMessageChunk

Delta changes in streaming response

Fields

Field Type Required Description Example
role Optional[components.ChatStreamingMessageChunkRole] The role of the message author assistant
content OptionalNullable[str] Message content delta Hello
reasoning OptionalNullable[str] Reasoning content delta I need to
refusal OptionalNullable[str] Refusal message delta
tool_calls List[components.ChatStreamingMessageToolCall] Tool calls delta
reasoning_details List[components.ReasoningDetailUnion] Reasoning details for extended thinking models
audio Optional[components.ChatCompletionAudioOutput] N/A {
"id": "audio_abc123",
"expires_at": 1677652400,
"data": "UklGRnoGAABXQVZFZm10IBAAAAABAAEAQB8AAEAfAAABAAgAZGF0YQoGAACBhYqFbF1f",
"transcript": "Hello! How can I help you today?"
}