← All comparisons
GPT-5.5 (medium) vs Claude 4.1 Opus (Reasoning)
OpenAI vs Anthropic — side-by-side benchmark comparison
| GPT-5.5 (medium) | Claude 4.1 Opus (Reasoning) | |
|---|---|---|
| Intelligence Index | 56.7 | 42.0 |
| Coding Index | 56.2 | 36.5 |
| Math Index | — | 80.3 |
| Output speed (tok/s) | 60.3 | 44.5 |
| Blended price ($/1M) | $11.25 | $32.81 |
| Time to first token (s) | 5.26s | 8.55s |
| aime | — | — |
| aime 25 | — | 80.3% |
| artificial analysis coding index | 56.20 | 36.50 |
| artificial analysis intelligence index | 56.70 | 42.00 |
| artificial analysis math index | — | 80.30 |
| gpqa | 92.6% | 80.9% |
| hle | 40.6% | 11.9% |
| ifbench | 71.0% | 55.4% |
| lcr | 72.3% | 66.3% |
| livecodebench | — | 65.4% |
| math 500 | — | — |
| mmlu pro | — | 88.0% |
| scicode | 53.5% | 40.9% |
| tau2 | 91.8% | 71.4% |
| terminalbench hard | 57.6% | 34.3% |
Benchmark data from Artificial Analysis.