UsageInfo

Usage statistics.

For streaming responses, 'usage' field is included in the very last response chunk returned.

Note that returning 'usage' for streaming requests is an OpenAI API extension. If you use OpenAI SDK, you might access the field directly even if it's not present in the type signature in the SDK.

{
    "prompt_tokens": 0,
    "completion_tokens": 0,
    "total_tokens": 0
}