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Fortune Tech
OpenAI’s new reasoning models: What you need to know
BY
Andrew Nusca
![Greg Brockman, president and co-founder of OpenAI, during an event in Seoul, South Korea, on Nov. 4, 2024. (Photo: Jean Chung/Bloomberg/Getty Images)](\"https://fortune.com/img-assets/wp-content/uploads/2025/04/GettyImages-2182154107.jpg?w=1024\")