OptionalcacheCache-creation tokens consumed by this LLM call. Null when not provided.
OptionalcacheCache-read tokens consumed by this LLM call. Null when not provided.
OptionaldurationWall-clock duration of the LLM call in milliseconds. Null when not provided.
OptionalinputInput tokens consumed by this LLM call. Null when not provided.
OptionaloutputOutput tokens produced by this LLM call. Null when not provided.
OptionalreasoningReasoning tokens consumed by this LLM call. Null when not provided.
Per-call token and latency metrics for an ASSISTANT history item, as submitted on a create/update request. All fields are optional: omit a field the caller has no value for rather than sending it as an explicit null.