I’m trying to get my bot to give an intermediate message when it makes a function call. I’m trying to catch the call - item.type === “function_call” and send response.create which will create an intermediate message. I’m getting the following error: { “type”: “error”, “event_id”: “event_Cwm4B…

In that case, if you are relaying the audio output yourself, you could use a “thinking sound”, the audio equivalent of a progress bar, instead of having the AI generate audio itself “hold on while I research…” which would delay the start. It’s only appropriate on an AI forum that I not open up a ro…

I searched there and didn’t find the answer I was looking for.

A tool call to a function must be immediately paired with a “tool” response returned back to the AI with matching ID. Thus, you cannot “inject” something in the middle or have the AI alternately act, unless you were to make a separate call with a tool return that was also re-prompted to talk about …

I’m building a voice bot, so I don’t have any visual UI where I can show progress messages. I’ll try the approach of using instructions so the model announces the intent before calling the function. Thanks for the explanation — I’ll let you know how it goes.

Thanks a lot! We ended up using soft keyboard-typing sounds in the end. Hopefully our users will love it. Really appreciate your help! :heart:

Asynchronous function_calling events

API

EricGT January 11, 2026, 11:06am 2

FYI

I do not use the OpenAI API.

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HTH

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Asynchronous function_calling events

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