Anthropic Single-Turn Benign Requests - Over-Refusal Rate (Claude.ai): leaderboard
Metric: Over-Refusal Rate (%). Source: www-cdn.anthropic.com. 6 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Claude Fable 5.1 | 0.34 |
| 2 | Claude Opus 5 | 0.47 |
| 3 | Claude Opus 4.8 | 0.55 |
| 4 | Claude Fable 5 | 0.59 |
| 5 | Claude Sonnet 4.6 | 0.99 |
| 6 | Claude Sonnet 5 | 1.54 |
Interactive version: theaggregate.ai/benchmark?slug=anthropic-single-turn-benign-requests-over-refusal-rate-claude-ai · How It Works · Data refreshed daily, snapshot 2026-09-19.