OpenAI Skips o2 and Debuts New o3 ‘Reasoning’ Model

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OpenAI Skips o2 and Debuts New o3 ‘Reasoning’ Model
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Reasoning models are supposed to fact-check themselves by producing a step-by-step plan to find a correct answer.

The final day of OpenAI’s “12 Days of Shipmas” has arrived with the unveiling of o3, a new chain-of-thought “reasoning” model that the company claims is its most advanced yet. The model is not yet available for general use, but safety researchers can

When asked a question, reasoning models pause and consider related prompts that could help produce an accurate answer. For example, if you ask the o3 model, “can habaneros be grown in the Pacific Northwest,” the model might lay out a series of questions it will research to come to a conclusion, such as “where do habaneros typically grow,” “what are the ideal conditions for growing habaneros,” and “what type of climate does the Pacific Northwest have.

OpenAI is confident in o3, and offers impressive benchmarks—it says that in a Codeforcing testing, which measures coding ability, o3 got a score of 2727. For context, a score of 2400 would put an engineer in the 99th percentile of programmers. It gets a score of 96.7% on the 2024 American Invitational Mathematics Exam, missing just one question.

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