USAMO 2026: leaderboard
2026 USA Mathematical Olympiad proof-based evaluation reported in Anthropic's Claude Opus 4.8 system card using MathArena-style model-judge grading.
Metric: Score (%). Source: anthropic.com. Source: benchmarklist.com. Saturation forecast: Around January 2027. 4 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | Claude Mythos 5 | 99.8 | #2 |
| 2 | Claude Opus 4.8 | 96.7 | #37 |
| 3 | Claude Sonnet 5 | 79.5 | #57 |
| 4 | Claude Sonnet 4.6 | 55 | #90 |
No result here: #3 Claude Opus 5.5, #6 GPT-6 Astra, #7 GPT-6.1 Sol.
Interactive version: theaggregate.ai/benchmark?slug=usamo-2026 · How It Works · Data refreshed daily, snapshot 2026-10-20.