GPT-5.5 Pro
★ Elite9.5
/ 10
GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...
Specifications
| Attribute | Value |
|---|---|
| Lab | OpenAI |
| Tags | Reasoning |
| Overall Score | 9.5/10 |
| Release Date | 2026-04 |
| Context Window | 1,050,000 tokens |
| Input Price / 1M | $30.00 |
| Output Price / 1M | $180.00 |
| Input Modalities | Text |
| Output Modalities | Text |
Strengths
Weaknesses
Best For
Sources & Further Reading
Related Models
Scores are aggregated from public benchmarks (MMLU, HumanEval, MATH, GSM8K, LMSYS) and normalized to a 1–10 scale. Methodology →