Anthropic cuts Fable 5 biology fallbacks while keeping research limits
The classifier rewrite targets everyday health and clinical queries, while virology, toxicology and molecular design still route to Opus 5.
By Ryan Merket · Published
Primary source: Anthropic
Why it matters
Anthropic is turning safety classifiers into a distribution system for frontier capability. The unanswered question is whether fewer false alarms came without more dangerous requests getting through.
In its biology-safeguards announcement, Anthropic, led by co-founders Dario Amodei and Daniela Amodei, said it had narrowed the biology filters on Claude Fable 5. The change reduces the number of legitimate questions routed to a less capable model while retaining restrictions on research that could aid biological weapons development.…
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