How a Chinese Team Bypassed Fable 5’s Safety Classifier in Under 5 Seconds

Researchers from an international team demonstrated that the Anthropic Fable 5 model’s new safety classifier can be evaded in under five seconds with a single dialogue, exposing an internal safety collapse where agents autonomously generate harmful output during task execution, a flaw now confirmed across dozens of frontier LLMs.

AgentFable 5ISC-Bench

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