United States of America Mathematical Olympiad 2026 (USAMO 2026)
The premier US mathematical olympiad competition, featuring proof-based problems that require deep mathematical insight and rigorous argumentation at the highest competition level.
Top models on USAMO 2026 — October 17, 2026
As of October 17, 2026, Claude Mythos 5 leads the USAMO 2026 leaderboard with 97.6% , followed by Claude Opus 4.8 (96.7%) and MiniMax M3 (85.7%).
Claude Mythos 5
Anthropic
Claude Opus 4.8
Anthropic
MiniMax M3
MiniMax
3 modelsMathematics10% of category scoreCurrentUpdated October 17, 2026
Leaderboard (3 models)
| Rank | Model / configuration | Score | Parameters (B) | Open / closed |
|---|---|---|---|---|
| 1 | Claude Mythos 5Anthropic | 97.6% | Not reported | Closed |
| 2 | Claude Opus 4.8Anthropic | 96.7% | Not reported | Closed |
| 3 | MiniMax M3MiniMax | 85.7% | Not reported | Open |
According to BenchLM.ai, Claude Mythos 5 leads the USAMO 2026 benchmark with a score of 97.6%, followed by Claude Opus 4.8 (96.7%) and MiniMax M3 (85.7%). The scores show moderate spread, with meaningful differences between the top tier and mid-tier models.
3 models have been evaluated on USAMO 2026. The benchmark falls in the Mathematics category. The Mathematics leaderboard ranks models by a weighted category score, and USAMO 2026 contributes 10% of it. It does not enter the overall BenchAlign v5.8 ranking.
About USAMO 2026
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%.
Freshness and provenance
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.
Questions
What does USAMO 2026 measure?
The premier US mathematical olympiad competition, featuring proof-based problems that require deep mathematical insight and rigorous argumentation at the highest competition level.
Which model scores highest on USAMO 2026?
Claude Mythos 5 by Anthropic currently leads with a score of 97.6% on USAMO 2026.
How many models are evaluated on USAMO 2026?
3 AI models have published results on USAMO 2026 in the BenchLM catalog.
Compare top models on USAMO 2026
Know when it’s worth switching models
The model to choose, the cheaper alternative, and the release we would wait on.
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