Example

{
  "type": "conversation.item.input_audio_transcription.completed",
  "event_id": "event_CCXGRvtUVrax5SJAnNOWZ",
  "item_id": "item_CCXGQ4e1ht4cOraEYcuR2",
  "content_index": 0,
  "transcript": "Hey, can you hear me?",
  "usage": {
    "type": "tokens",
    "total_tokens": 22,
    "input_tokens": 13,
    "input_token_details": {
      "text_tokens": 0,
      "audio_tokens": 13
    },
    "output_tokens": 9
  }
}

conversation.item.input_audio_transcription.delta

Returned when the text value of an input audio transcription content part is updated with incremental transcription results.