Side-by-side comparison of AI model specs, benchmarks, and pricing.
| Spec | GPT-5.1 OpenAI | o4-mini OpenAI |
|---|---|---|
| Tier | frontier | frontier |
| Release Date | 2025-11-13 | 2025-04-16 |
| Context Window | 400K | 200K |
| Max Output | 128K | 100K |
| Input Price (/1M) | $1.25 | $1.1 |
| Output Price (/1M) | $10 | $4.4 |
| Arena Elo | 1,458 | 1,380 |
| MMLU | 91.5% | 86.8% |
| GPQA | 88.1% | 73.4% |
| MATH | — | 93.4% |
| HumanEval | 96% | 93.6% |
| SWE-bench | 62% | 68.5% |
| AIME | 82% | 93.4% |
| SimpleQA | 48% | 40.3% |
| Capabilities | vision, tool-use, code, reasoning, agentic | vision, tool-use, code, reasoning |