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Preview · early version, more releases are being added · early version
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OpenAI · model release

GPT-4.5 research preview

OpenAI releases GPT-4.5, a chat model it says feels more natural and understands intent better.

In detail

OpenAI released GPT-4.5 as a research preview, which it described as its largest and best model for chat. It was offered to Pro users and developers worldwide.

Sources

  1. Introducing GPT-4.5 · OpenAI · Primary source

Last checked 11 November 2026.

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