BioMysteryBench Human Difficult (Fable/Mythos) — leaderboard
Metric: Score (%). Source: www-cdn.anthropic.com. 4 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Claude Mythos 5 | 46.1 |
| 2 | Claude Opus 4.8 | 40 |
| 3 | Claude Sonnet 4.6 | 30.9 |
| 4 | Claude Mythos Preview | 29.6 |
Interactive version: theaggregate.ai/benchmark?slug=biomysterybench-human-difficult-fable-mythos · How the rankings work · Data refreshed daily, snapshot 2026-07-22.