OpenAI retires several ChatGPT models
OpenAI’s help centre notes that multiple models previously available in ChatGPT—listed as GPT-4o, GPT-4.1, GPT-4.1 mini, o4-mini and several GPT-5 variants—have been retired from the ChatGPT product while API access arrangements remain differentiated by plan. The help-centre entry also distinguishes access patterns for Business, Enterprise and Education customers. (help.openai.com)
OpenAI has removed several older models from ChatGPT, ending in-product access to GPT-4o, GPT-4.1, GPT-4.1 mini, o4-mini, and GPT-5 Instant and Thinking. (help.openai.com) OpenAI’s help center says the change took effect on February 13, 2026, and applies to ChatGPT itself rather than the company’s application programming interface, or API, which still keeps those models available. (help.openai.com) For paying workplace customers, the phaseout ran longer: ChatGPT Business, Enterprise, and Education users kept GPT-4o inside custom GPTs until April 3, 2026, before full retirement across plans. (help.openai.com) A model list inside ChatGPT works like a menu in the app, while the API is the developer pipe that lets companies keep using a model in their own software. OpenAI’s notices separate those two systems and say future API retirements will get advance notice. (help.openai.com) The shift leaves ChatGPT users on newer model families, including GPT-5.3 and GPT-5.4, which OpenAI documents in the same help-center article that now carries the retirement notice. (help.openai.com) OpenAI has also been pruning other ChatGPT options this year. Its model release notes say GPT-5.1 Instant, GPT-5.1 Thinking, and GPT-5.1 Pro were retired from ChatGPT on March 11, 2026. (help.openai.com) The company’s Business and Enterprise-and-Education model pages now repeat the same retirement language, showing the change is not a one-off edit on a single support article but a product-wide policy across ChatGPT plans. (help.openai.com, help.openai.com) The practical result is simpler than the model names suggest: people using ChatGPT can no longer pick those retired systems in the app, while developers with API access may still be able to call them outside ChatGPT. (help.openai.com)
