Example
json
{
"type": "response.event",
"event_id": "evt_response_002",
"delegation_id": "del_responses123",
"event": {
"type": "response.output_text.delta",
"item_id": "msg_abc123",
"output_index": 0,
"content_index": 0,
"delta": "An outdoor table is available at 7 PM.",
"sequence_number": 3,
"logprobs": []
}
}session.usage.updated
Reports cumulative Live audio usage and, when available, the most recent context-window usage. Delegated Responses token usage is reported separately in response.event events.