Skill2-Bench - High Skill Entropy: leaderboard
Skill2-Bench (2026) chains 2 to 10 dependent steps that switch between reasoning skills across nine domains and scores the average per-step correctness in percent; higher is better. This board holds the high skill-entropy tasks, whose skill switches are the hardest; open-ended steps are scored by a Claude-opus-4.7 rubric judge.
Metric: Average per-step score (%; high skill-entropy tasks, the hardest skill switches; held-out test set of 300 cross-skill long-horizon tasks of 2 to 10 dependent steps over 558 skills in nine verifiable and open-ended domains, the whole task given in one prompt; verifiable steps graded for correctness, open-ended steps scored 0 to 1 by a Claude-opus-4.7 rubric judge; four samples, temperature 0.7 for open-weight models and provider defaults for API models). Source: arxiv.org. Saturation forecast: Around February 2027. 12 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | Gemini 3.1 Pro (Preview) | 72.2 | #91 |
| 2 | GPT-5.5 | 71.9 | #48 |
| 3 | Claude Opus 4.7 | 68.6 | #75 |
| 4 | Claude Sonnet 4.5 | 59.5 | #244 |
| 5 | O4 Mini | 58.6 | #354 |
| 6 | Claude Haiku 4.5 | 54.9 | #568 |
| 7 | GPT-5.4 Mini | 42.7 | #389 |
| 8 | Qwen 3 32B | 41 | #960 |
| 9 | Qwen 3 8B | 31.5 | #1838 |
| 10 | Qwen 3 4B | 26 | #2297 |
| 11 | OLMo 3 7B (Thinking) | 7.4 | #3939 (OLMo 3 7B) |
No result here: #1 Claude Fable 5.2, #2 Gemini 4 Carbon, #5 Claude Opus 5.5.
Interactive version: theaggregate.ai/benchmark?slug=skill2-bench-high-skill-entropy · How It Works · Data refreshed daily, snapshot 2026-11-12.