openai/gpt-5.5-proGPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads.
Scores on standardized evaluations. Higher is better — and rank shows where GPT-5.5 Pro lands among all models tracked on Model Beat.
Abstract visual reasoning
Harder abstract reasoning
Graduate-level scientific reasoning
Common-sense trick questions
Factual accuracy & hallucination
Olympiad-qualifier math
Research-level math problems
Hardest research math
Model & benchmark data from Epoch AI (CC BY); pricing, specs & descriptions from OpenRouter.