It appears advanced voice mode is not available in custom GPTs. This is hugely limiting custom solutions built for handsfree interactions using custom GPTs that leverage function calling. Is there a timeline or ETA for when Advanced Voice Mode will be available in custom GPTs?

Advanced voice mode is now available in my custom gpt, but now it appears that function calling doesn’t work. Has anyone else run into this. Is it a known issue?

Advanced Voice Mode Support in Custom GPTs

GPT builders

rboade October 22, 2025, 5:40am 19

There is a new thread discussing the limitations of advanced voice in custom GPTs that can be found here. Function Calling Not Working In Advanced Voice Mode

Topic		Replies	Views
Function Calling Not Working In Advanced Voice Mode GPT builders custom-gpt , advanced-voice	16	782	November 27, 2025
Is it just me or do custom GPTs not support voice at all? GPT builders	11	2209	August 21, 2025
GPT-5 Voice in Custom GPTs; broken transcription, making it useless? GPT builders gpt-5 , voice	0	201	August 11, 2025
Issue: Old Version of Voice Input in Custom GPTs (iOS App) GPT builders	3	268	October 10, 2024
Actions in the mobile apps broken since GPT-5 Plugins / Actions builders chatgpt , gpt-5	7	623	September 14, 2025

Advanced Voice Mode Support in Custom GPTs

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