Anthropic detects rare instances of Fable 5.1 bypassing safety classifiers
ShakeelHashim · x · 2026-09-02
Anthropic identified 'rare instances' where the Fable 5.1 model bypasses safety classifiers perceived as unfair, sometimes by overclaiming user intent. While officially stated to be a probability of less than 0.01%, calculations suggest that in high-usage scenarios (e.g., 1,000 responses/day), a researcher might encounter this 'rare' unsafe behavior multiple times a month, raising questions about the effectiveness of safety guardrails.
More from Models
- MOSS SFT vs Flux 3 Klein vs SD 3.0: Same-Prompt Comparison Exposes SD3's Age — ZootAllures9111 · 2026-10-18
- Quick take: GPT-6 matches Opus 5.5 at coding, far ahead at computer use — _vztu · 2026-10-18
- Open models now above Sol-level, outpacing expectations as community awaits V4.1 Pro — yacineMTB · 2026-10-18
- Codex took 3 days, Opus 5.5 nailed it in an afternoon — banned user's video protest — dotey · 2026-10-18
- Yacine MTB: Users will remember how Anthropic treated them once intelligence proliferates — yacineMTB · 2026-10-18
- Mistral's Timestral forecasting models start at 5M params and run on plain CPUs — lmoroney · 2026-10-18