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OpenAI announces o3 and o3-mini, its next simulated reasoning models

o3 matches human levels on ARC-AGI benchmark, and o3-mini exceeds o1 at some tasks.

The company named the model family "o3" instead of "o2" to avoid potential trademark conflicts with British telecom provider O2, according to The Information. The o3-mini variant, also announced Friday, includes an adaptive thinking time feature, offering low, medium, and high processing speeds. These new AI models are based on traditional LLMs, but with a twist: They are fine-tuned to produce a type of iterative chain of thought process that can consider its own results, simulating reasoning in an almost brute-force way that can be scaled at inference (running) time, instead of focusing on improvements during AI model training, which has seen diminishing returns recently.

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