OpenAI CEO Sam Altman has bid farewell to GPT-4, the revolutionary 2023 AI model, fully replacing it with the more advanced GPT-4o in ChatGPT as of April 30, 2025. Altman praised GPT-4’s legacy, while ...

Sam Altman, in a farewell post on X (formerly Twitter), offered a tongue-in-cheek tribute to the now-replaced model ...