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tts-1 and tts-1-hd shut down on 6 January 2027

OpenAI retires tts-1, tts-1-hd and gpt-4o-mini-tts on 6 January 2027. The replacement, gpt-realtime-2.1-mini, doesn’t work on /v1/audio/speech, the API’s text-to-speech endpoint: only on the Realtime API. It’s a migration, not a name change.

Checked on

tts-1 OpenAI

Shutdown date: 6 January 2027

Official replacement: gpt-realtime-2.1-mini

What changes in your code

  • The replacement, gpt-realtime-2.1-mini, doesn’t work on /v1/audio/speech: only on the Realtime API. It isn’t a name change: the part that makes the voice has to be rebuilt.
  • If you only turned text into audio files, plan for a realtime connection (WebSocket or WebRTC) instead of one HTTP request.

Sources: OpenAI · Deprecations · OpenAI · gpt-realtime-2.1-mini · Realtime API

tts-1-hd OpenAI

Shutdown date: 6 January 2027

Official replacement: gpt-realtime-2.1-mini

Sources: OpenAI · Deprecations

gpt-4o-mini-tts OpenAI

Shutdown date: 6 January 2027

Official replacement: gpt-realtime-2.1-mini

Sources: OpenAI · Deprecations

We’ll email you before your model is switched off

One email 30 days before and another 7 days before the official date, with the replacement and what changes in the code. Free, no account, no marketing.

Which models does your app use?
More models (41)

Using more than one model? Paste your code into the free checker.

Open the checker

Got a whole repository? Check it at once from the terminal, with nothing to install:

npx -y github:ericc2005t/ai-model-sunset

The code, on GitHub →

Questions

Can I keep using /v1/audio/speech?
With gpt-realtime-2.1-mini, no: its page says that endpoint isn’t supported. You have to move to the Realtime API.
How much work is it?
It depends on how you use the voice. One file per request becomes a realtime session: usually the biggest part of the migration.

Rather I fix it for you? Model swap, €79; full migration, €290–490. I reply within 24 h with a fixed price.

Ask for the fix: I reply within 24 h

No calls and nothing to pay here. Tell me what your app runs on and what breaks: I reply in writing within 24 h with a fixed price and a timeline.

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