GPT-5.5 Pro
GPT-5.5 Pro is the Pro variant of GPT-5.5, designed for the hardest questions and highest-accuracy work. It scales reasoning further than GPT-5.5 with significantly more comprehensive, well-structured, and accurate responses, with especially strong performance in business, legal, education, science, and data analysis. Priced at $30/1M input and $180/1M output tokens with a 1M context window.
Benchmark results
| Benchmark | Score | Tags | Source |
|---|---|---|---|
| BrowseComp | 90.1% | self-reported llm-stats | link → |
| FrontierMath | 39.6% | self-reported llm-stats | link → |
| GDPval-MM | 82.3% | self-reported llm-stats | link → |
| GeneBench | 33.2% | self-reported llm-stats | link → |
| Humanity's Last Exam | 57.2% | self-reported llm-stats | link → |