# 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.

Canonical page: https://benchlm.ai/benchmarks/usamo2026

- Category: [Mathematics](/math)
- Last updated: October 17, 2026

## About USAMO 2026

- Year: 2026
- Tasks: 6 proof-based problems
- Format: Mathematical proof construction
- Difficulty: International olympiad level
- Paper: [United States of America Mathematical Olympiad](https://www.maa.org/math-competitions/usamo)

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%.

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.

## Leaderboard (3 models)

| Rank | Model | Creator | Score |
|------|-------|---------|-------|
| 1 | [Claude Mythos 5](/models/claude-mythos-5) | Anthropic | 97.6% |
| 2 | [Claude Opus 4.8](/models/claude-opus-4-8) | Anthropic | 96.7% |
| 3 | [MiniMax M3](/models/minimax-m3) | MiniMax | 85.7% |

## FAQ

### 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.

### Does USAMO 2026 affect BenchLM's overall score?

Not the overall score. 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.

## Compare Top Models on USAMO 2026

- [Claude Mythos 5 vs Claude Opus 4.8](/compare/claude-mythos-5-vs-claude-opus-4-8)
- [Claude Opus 4.8 vs MiniMax M3](/compare/claude-opus-4-8-vs-minimax-m3)