OpenAI shares plans for GPT-4.5, GPT-5 AI models: All you need to know

OpenAI CEO Sam Altman has shared details on the company’s plans for future artificial intelligence models. In a post on X (formerly Twitter), Altman announced that OpenAI will soon release GPT-4.5, internally referred to as Orion. He added that GPT-4.5 will be the company’s last “non-chain-of-thought model,” as OpenAI aims to unify its AI capabilities into a single, more advanced system with GPT-5.