IMO 2026 A
AI benchmark · Math
Full listing name: IMO 2026 (Anthropic evaluation)
What is IMO 2026?
Anthropic's evaluation of Claude Opus 5 on the six proof-based problems from the 2026 International Mathematical Olympiad, graded by three frontier-model judges and corroborated by human experts.
Tier A
Widely used: a lab reports it, or 50 or more models are scored on it.
How much stands behind a tier: usage, who backs it, a confirmed line from its own site or paper, and a clear read on X. High with three of the four, medium with two, low otherwise.
- 1 models scored
- reported by Anthropic
- in curated RL directories (2 pts)
On X · well regarded, moderate buzz, from 5 posts about IMO 2026 in the last month
Labs like NVIDIA and dots3 report official IMO 2026 scores, including a verified 42/42, and model releases use it as a post-cutoff reasoning test.
How we got to tier A
- Adoption: 1 models scored; reported by Anthropic. Tier A.
- On X: well regarded, moderate buzz. “Labs like NVIDIA and dots3 report official IMO 2026 scores, including a verified 42/42, and model releases use it as a post-cutoff reasoning test.” No move.
- In curated RL directories: 2 points, a floor of C.
- Not yet confirmed by a line from its own site or paper.
A clear view on X moves a tier one step up or down; most entries don't move. How tiers work.
Not on the map yet: no line from its own site or paper places it in a domain.
Next: browse all benchmarks. Entry from the RL Research daily scrape of public sources, 2026-10-11 snapshot.