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Streams incremental assistant text output, including text associated with spoken RTC media. The first delta for an item_id and output_index implicitly introduces that streamed text item.

Event fields

string
required
Unique id for this server event.
string
required
Event type. Must be response.output_text.delta.
string
required
The ID of the response.
string
required
The ID of the message item receiving text. If the client has not seen this item before, create it from this event and finalize it with response.output_item.done.
number
required
The index of the output item in the response.
string
required
Incremental text.