The premier US mathematical olympiad competition, featuring proof-based problems that require deep mathematical insight and rigorous argumentation at the highest competition level.
BenchLM mirrors the published score view for USAMO 2026. Claude Mythos Preview leads the public snapshot at 97.6% , followed by Claude Opus 4.8 (96.7%) and MiniMax M3 (85.7%). BenchLM does not use these results to rank models overall.
Claude Mythos Preview
Anthropic
Claude Opus 4.8
Anthropic
MiniMax M3
MiniMax
The published USAMO 2026 snapshot is tightly clustered at the top: Claude Mythos Preview sits at 97.6%, while the third row is only 11.9 points behind. The broader top-10 spread is 11.9 points, so the benchmark still separates strong models even when the leaders cluster.
3 models have been evaluated on USAMO 2026. The benchmark falls in the Math category. This category carries a 5% weight in BenchLM.ai's overall scoring system. USAMO 2026 is currently displayed for reference but excluded from the scoring formula, so it does not directly affect overall rankings.
Year
2026
Tasks
6 proof-based problems
Format
Mathematical proof construction
Difficulty
International olympiad level
USAMO represents the highest tier of US math competitions, serving as the selection exam for the International Mathematical Olympiad team. Problems require full proofs rather than just numerical answers. Mythos Preview scored 97.6%, GPT-5.4 scored 95.2%, Gemini 3.1 Pro scored 74.4%.
Version
USAMO 2026 2026
Refresh cadence
Quarterly
Staleness state
Current
Question availability
Public benchmark set
BenchLM uses freshness metadata to decide whether a benchmark should still be treated as a strong differentiator, a benchmark to watch, or a display-only reference. For the full scoring policy, see the BenchLM methodology page.
The premier US mathematical olympiad competition, featuring proof-based problems that require deep mathematical insight and rigorous argumentation at the highest competition level.
Claude Mythos Preview by Anthropic currently leads with a score of 97.6% on USAMO 2026.
3 AI models have been evaluated on USAMO 2026 on BenchLM.
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