SWE-bench Pro (Anthropic Scaffold) — leaderboard
Metric: Pass@1 (%). Source: www-cdn.anthropic.com. 6 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Claude Mythos 5 | 80.3 |
| 2 | Claude Fable 5 | 80 |
| 3 | Claude Mythos Preview | 77.8 |
| 4 | Claude Opus 4.8 | 69.2 |
| 5 | GPT-5.5 | 58.6 |
| 6 | Gemini 3.1 Pro (Preview) | 54.2 |
Interactive version: theaggregate.ai/benchmark?slug=swe-bench-pro-anthropic-scaffold · How the rankings work · Data refreshed daily, snapshot 2026-07-22.