| Benchmark | Claude Sonnet 4.5 | GPT-5.5 |
|---|---|---|
| AA Agentic Index | 50.6 | 47.4 |
| AA Intelligence | 37.4 | 56.3 |
| AA-LCR | 68.3 | 79 |
| AA-Omniscience | -0.1 | 20.5 |
| arc_agi_1 | 63.7 | 95 |
| ARC-AGI-2 | 13.6 | 85 |
| arena_elo | 1456 | 1482 |
| arena_text_factuality | 1448 | 1482 |
| Artificial Analysis Coding Index | 52.1 | 74.9 |
| browsecomp | 24.1 | 84.4 |
| coding_arena_elo | 1392 | 1457 |
| critpt | 1.1 | 27.1 |
| Fortress | 17 | 16.3 |
| frontiermath_tier_4 | 4.2 | 35.4 |
| gdpval | 40.4 | 49.5 |
| GPQA Diamond | 83.4 | 93.6 |
| HealthBench | 44.2 | 56.5 |
| HLE | 19.8 | 52.2 |
| HLE (with tools) | 32 | 52.2 |
| hmmt_nov_2025 | 81.7 | 96.5 |
| IFBench | 57.3 | 75.9 |
| matharena_visual_math_overall | 75.8 | 94.9 |
| MCP Atlas | 59.5 | 82.8 |
| MMMU-Pro | 68.7 | 83.2 |
| OmniScience Accuracy | 32.9 | 58 |
| OmniScience Non-Hallucination | 50.9 | 12 |
| OSWorld-Verified | 61.4 | 78.7 |
| scicode | 45 | 56.1 |
| simplebench | 54.3 | 69 |
| simpleqa_verified | 23.6 | 63.1 |
| SWE-bench Pro | 43.6 | 58.6 |
| SWE-bench Verified | 82 | 80.6 |
| TauBench V3 - Banking | 24.5 | 39 |
| Terminal-Bench 2.0 | 50 | 82.7 |
| Terminal-Bench 2.1 | 55.8 | 84.3 |
| Terminal-Bench Hard | 35.6 | 60.6 |
| toolathlon | 41 | 55.6 |
| vectara_answer_rate | 95.6 | 100 |
| vectara_avg_summary_length | 127.8 | 129.6 |
| vectara_factual_consistency | 88 | 90.7 |
| vectara_hallucination_rate ↓ | 12 | 9.3 |
| τ²-Bench Telecom (AA run) | 78.1 | 93.9 |
| τ³-Bench | 19 | 31.3 |
Best tracked score per model per benchmark (default configuration; source-attributed). ↓ marks lower-is-better metrics. Open either model for its full surface, provenance and pricing.