Claude Fable 5's Biology Guardrails Block High School–Level Questions
Anthropic's new Mythos-class model refuses to answer basic biology queries, routing them to Claude Opus 4.8 instead, in a deliberate safety tradeoff.
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Anthropic's Fable Faces Backlash Over Overly Aggressive Safety Filters
Security researchers criticize Anthropic's new cybersecurity model for blocking legitimate defensive work through keyword-based content restrictions.