If you're using GPT-5.4 or GPT-5.4 mini inside ChatGPT, you need to migrate that usage to the API (or an API-key-authenticated Codex session) before August 31 or lose access to those models in the ChatGPT UI.
OpenAI announced that GPT-5.4 and GPT-5.4 mini will no longer be selectable by users signed into ChatGPT starting August 31, though both models will remain accessible through the OpenAI API and in Codex sessions authenticated with an API key.
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GPT-5.4 and GPT-5.4 mini will no longer be available for users signed in with ChatGPT starting August 31.
The models will remain available on the OpenAI API and Codex sessions authenticated with an API key.
https://t.co/kZYJU0UqBt
