Example

{
    "event_id": "event_5152",
    "type": "response.output_audio.done",
    "response_id": "resp_001",
    "item_id": "msg_008",
    "output_index": 0,
    "content_index": 0
}

response.function_call_arguments.delta

Returned when the model-generated function call arguments are updated.