# ChatStreamingResponseChunk

Streaming chat completion chunk


## Fields

| Field                                                                                                                                                                         | Type                                                                                                                                                                          | Required                                                                                                                                                                      | Description                                                                                                                                                                   | Example                                                                                                                                                                       |
| ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `id`                                                                                                                                                                          | *str*                                                                                                                                                                         | :heavy_check_mark:                                                                                                                                                            | Unique chunk identifier                                                                                                                                                       | chatcmpl-123                                                                                                                                                                  |
| `choices`                                                                                                                                                                     | List[[components.ChatStreamingChoice](../components/chatstreamingchoice.md)]                                                                                                  | :heavy_check_mark:                                                                                                                                                            | List of streaming chunk choices                                                                                                                                               |                                                                                                                                                                               |
| `created`                                                                                                                                                                     | *float*                                                                                                                                                                       | :heavy_check_mark:                                                                                                                                                            | Unix timestamp of creation                                                                                                                                                    | 1677652288                                                                                                                                                                    |
| `model`                                                                                                                                                                       | *str*                                                                                                                                                                         | :heavy_check_mark:                                                                                                                                                            | Model used for completion                                                                                                                                                     | openai/gpt-4                                                                                                                                                                  |
| `object`                                                                                                                                                                      | [components.ChatStreamingResponseChunkObject](../components/chatstreamingresponsechunkobject.md)                                                                              | :heavy_check_mark:                                                                                                                                                            | N/A                                                                                                                                                                           |                                                                                                                                                                               |
| `system_fingerprint`                                                                                                                                                          | *OptionalNullable[str]*                                                                                                                                                       | :heavy_minus_sign:                                                                                                                                                            | System fingerprint                                                                                                                                                            | fp_44709d6fcb                                                                                                                                                                 |
| `error`                                                                                                                                                                       | [Optional[components.Error]](../components/error.md)                                                                                                                          | :heavy_minus_sign:                                                                                                                                                            | Error information                                                                                                                                                             | {<br/>"message": "Rate limit exceeded",<br/>"code": 429<br/>}                                                                                                                 |
| `usage`                                                                                                                                                                       | [Optional[components.ChatGenerationTokenUsage]](../components/chatgenerationtokenusage.md)                                                                                    | :heavy_minus_sign:                                                                                                                                                            | Token usage statistics                                                                                                                                                        | {<br/>"completion_tokens": 15,<br/>"prompt_tokens": 10,<br/>"total_tokens": 25,<br/>"completion_tokens_details": {<br/>"reasoning_tokens": 5<br/>},<br/>"prompt_tokens_details": {<br/>"cached_tokens": 2<br/>}<br/>} |