OpenAI is launching its next major AI model. Codenamed Orion, GPT-4.5 is the latest AI model from OpenAI, but it’s not a frontier one.
OpenAI is launching GPT-4.5 today, its newest and largest model. GPT-4.5 will be available as a research preview, and OpenAI is calling it the company’s “largest and most knowledgeable model yet,” but warning that it’s not a frontier model and might not perform as well as o1 or o3-mini. GPT-4.
5 “using new supervision techniques combined with traditional methods like supervised fine-tuning and reinforcement learning from human feedback , similar to those used for GPT-4o.” Despite some of its limitations, GPT-4.5 hallucinates a lot less than GPT-4o, according to OpenAI, and slightly less than its o1 model. Leaks earlier this week suggested GPT-4.5 will be limited to ChatGPT Pro users, much like how Operator was released.
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