O3
o3
o3 is OpenAI's most advanced reasoning model, released in April 2025 as the successor to the o1 series, with o4-mini and o4-mini-high launched alongside it . It is designed for complex queries requiring multi-angle analysis, with particular strength in visual tasks like analyzing images, charts, and graphics . In benchmark tests, o3 set new state-of-the-art records on Codeforces, SWE-bench, MMMU, and ARC-AGI, while external expert evaluation found it reduced major errors by 20% compared to o1 in difficult real-world tasks spanning programming, business consulting, and creative ideation . The model was framed by 十字路口Crossing as a potential "key puzzle piece" in OpenAI's path toward AGI, though the same source questioned whether it might also serve as a transitional commercial stopgap . o3 and the o4 variants replaced the o1 series in ChatGPT Plus, Pro, and Team tiers as of the April 2025 launch .
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