o1-pro

o1-pro is OpenAI's advanced reasoning model trained with reinforcement learning to solve complex problems through extended chain-of-thought processing.

Strengths

Excels at difficult reasoning tasks, mathematical problem-solving, and multi-step inference across a wide range of domains.

Best for

Research, competitive programming, complex analysis, and problems that benefit from deep logical reasoning over raw scale.

Limitations

Slower and more resource-intensive than standard models like GPT-4.1; o3 is OpenAI's newer frontier reasoning model released after this one.