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GPT-5.5 (high) vs Claude 4.5 Haiku (Reasoning)
OpenAI vs Anthropic — side-by-side benchmark comparison
| GPT-5.5 (high) | Claude 4.5 Haiku (Reasoning) | |
|---|---|---|
| Intelligence Index | 58.9 | 37.1 |
| Coding Index | 58.5 | 32.6 |
| Math Index | — | 83.7 |
| Output speed (tok/s) | 66.7 | 142.2 |
| Blended price ($/1M) | $11.25 | $2.19 |
| Time to first token (s) | 16.72s | 10.48s |
| aime | — | — |
| aime 25 | — | 83.7% |
| artificial analysis coding index | 58.50 | 32.60 |
| artificial analysis intelligence index | 58.90 | 37.10 |
| artificial analysis math index | — | 83.70 |
| gpqa | 93.2% | 67.2% |
| hle | 43.0% | 9.7% |
| ifbench | 71.6% | 54.3% |
| lcr | 73.3% | 70.3% |
| livecodebench | — | 61.5% |
| math 500 | — | — |
| mmlu pro | — | 76.0% |
| scicode | 55.9% | 43.3% |
| tau2 | 93.0% | 54.7% |
| terminalbench hard | 59.8% | 27.3% |
Benchmark data from Artificial Analysis.