conversation.item.input_audio_transcription.delta

Event containing a partial transcript.

Concatenating deltas in order yields the full transcript.

Note

This event can be emitted very frequently. It does not include an event_id.

typestringrequired

Fixed value

Possible values: [conversation.item.input_audio_transcription.delta]

item_idstringnullablerequired

The item_id value specified as event_id in the input_audio_buffer.append event.

null if omitted.

deltastringrequired

Partial transcription result

conversation.item.input_audio_transcription.delta

{
  "type": "conversation.item.input_audio_transcription.delta",
  "item_id": "optional_any_id_1",
  "delta": "Hello,"
}