← All comparisons
GPT-5.3 Codex (xhigh) vs Claude 4.5 Haiku (Non-reasoning)
OpenAI vs Anthropic — side-by-side benchmark comparison
| GPT-5.3 Codex (xhigh) | Claude 4.5 Haiku (Non-reasoning) | |
|---|---|---|
| Intelligence Index | 53.6 | 31.0 |
| Coding Index | 53.1 | 29.6 |
| Math Index | — | 39.0 |
| Output speed (tok/s) | 84.7 | 105.8 |
| Blended price ($/1M) | $4.81 | $2.19 |
| Time to first token (s) | 60.27s | 0.65s |
| aime | — | — |
| aime 25 | — | 39.0% |
| artificial analysis coding index | 53.10 | 29.60 |
| artificial analysis intelligence index | 53.60 | 31.00 |
| artificial analysis math index | — | 39.00 |
| gpqa | 91.5% | 64.6% |
| hle | 39.9% | 4.3% |
| ifbench | 75.4% | 42.0% |
| lcr | 74.0% | 43.7% |
| livecodebench | — | 51.1% |
| math 500 | — | — |
| mmlu pro | — | 80.0% |
| scicode | 53.2% | 34.4% |
| tau2 | 86.0% | 32.5% |
| terminalbench hard | 53.0% | 27.3% |
Benchmark data from Artificial Analysis.