New Delhi, Feb. 13 -- 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 remain unaffected for now.

Among the models being discontinued, GPT-4o received particular attention.

OpenAI said it had initially planned to remove GPT-4o earlier, bu...