# ChatCompletionEventPreview
## Properties
Name | Type | Description | Notes
------------ | ------------- | ------------- | -------------
**event_id** | **String** | |
**correlation_id** | **String** | |
**created_at** | **String** | |
**extra_fields** | [**std::collections::HashMap<String, models::ExtraFieldsValue>**](ExtraFieldsValue.md) | |
**nb_input_tokens** | **i32** | |
**nb_output_tokens** | **i32** | |
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