TTS Api is very slow and giving timeout

Hi,

I could reproduce the issue with gpt-4o-mini-tss.

I tested the older tts models like tts-1 returned quickly, around 1–2 seconds.

I also tested the pinned gpt-4o-mini-tts versions, including gpt-4o-mini-tts-2025-03-20 and gpt-4o-mini-tts-2025-12-15 and those behaved normally too.

The only one where I saw the same delay was the unversioned alias:

gpt-4o-mini-tts

So from my side, this looks less like a general tts/audio issue and more like it may be specific to the current unversioned gpt-4o-mini-tts alias or whatever backend/version it is routing to.

If you contact Support , I’d include timestamps, request IDs if available, model name, input length and retry/timeout details when reporting it to Support or if OpenAI staff asks for examples.

https://help.openai.com/en