OpenAI is phasing out several of its older artificial intelligence models from ChatGPT today, marking the end of GPT-4o and a number of related systems as the company shifts its focus to newer generations.
In a blog update dated 29 January, the company confirmed that, from 13 February 2026, GPT-4o, GPT-4.1, GPT-4.1 mini and o4-mini will no longer be available inside ChatGPT. Previously announced retirements of GPT-5 Instant and GPT-5 Thinking are also taking effect. OpenAI clarified that these changes apply only to ChatGPT and that its API offerings…

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