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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.

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Event fields

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string
required
Unique id for this server event.
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string
required
Event type. Must be response.output_text.delta.
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string
required
The ID of the response.
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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.
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number
required
The index of the output item in the response.
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string
required
Incremental text.