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Improved Biology Safeguards in Claude Fable 5

Anthropic updated Claude Fable 5's biology safeguards, cutting biology-related fallbacks by about 85% across product surfaces. That means fewer legitimate

Anthropic updated Claude Fable 5's biology safeguards, cutting biology-related fallbacks by about 85% across product surfaces. That means fewer legitimate requests, like everyday health questions, educational biology content, and clinical tasks for healthcare professionals, get redirected to the less capable Opus 5 model. Fable 5 still blocks requests in dual-use research areas such as virology, toxicology, and molecular design.

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