OSWorld-Verified (Fable/Mythos) — leaderboard
Metric: Score (%). Source: www-cdn.anthropic.com. 7 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Claude Mythos Preview | 85.4 |
| 2 | Claude Fable 5 | 85 |
| 3 | Claude Mythos 5 | 85 |
| 4 | Claude Opus 4.8 | 83.4 |
| 5 | GPT-5.5 | 78.7 |
| 6 | Gemini 3.5 Flash | 78.4 |
| 7 | Gemini 3.1 Pro (Preview) | 76.2 |
Interactive version: theaggregate.ai/benchmark?slug=osworld-verified-fable-mythos · How the rankings work · Data refreshed daily, snapshot 2026-07-22.