o3

o3 is OpenAI's advanced reasoning model designed for problems that require deliberate, multi-step thinking. Unlike standard language models that generate responses token-by-token, o3 employs an extended chain-of-thought process that breaks complex problems into manageable steps, verifies intermediate results, and self-corrects before producing a final answer.

This reasoning-first approach makes o3 exceptionally capable at mathematics, formal logic, scientific analysis, and strategic planning. It consistently outperforms traditional models on benchmarks requiring multi-hop reasoning and constraint satisfaction.