OpenAI finally unveils GPT-4.5. Here's what it can do
Published on: 2025-11-18 18:11:00
OpenAI
Earlier this month, OpenAI CEO Sam Altman shared a roadmap for its upcoming models, GPT-4.5 and GPT-5. In the X post, Altman shared that GPT-4.5, codenamed Orion internally, would be its last non-chain-of-thought model. Other than that, the details of the model remained a mystery -- until today.
GPT-4.5 has launched
On Thursday morning, OpenAI ominously announced it would host a livestream in 4.5 hours, a hint at its latest and greatest model. During the livestream, OpenAI unveiled GPT-4.5 in a research preview, which the company claims is the "largest and most knowledgeable model yet."
OpenAI said users should experience an overall improvement when using GPT-4.5, meaning fewer hallucinations, stronger alignment to their prompt intent, and improved emotional intelligence. Overall, interactions with the model should feel more intuitive and natural than with preceding models, mostly because of its deeper knowledge and improved contextual understanding.
Also: OpenAI's reasonin
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