tech
Improving Fable 5 Safeguards
We’re making updates to Claude Fable 5’s biology safeguards in a way that substantially reduces false positives. Fable 5 users will now experience many fewer “fallbacks”—where the system switches to a less capable model after they make a biology-related query. In our testing, this update reduced biology-related fallbacks by about 85% across our product surfaces.1
TL;DR
- Fable 5's biology safeguards have been updated to reduce false positives by approximately 85%.
- Users will experience fewer 'fallbacks' where the system switches to a less capable model for biology-related queries.
- The update enables Fable 5 to assist with a wider range of biology tasks, including everyday health and educational questions, and clinical support.
- Safeguards remain in place for 'dual-use' queries like virology, toxicology, and molecular design, which could be misused for harmful purposes.
- Safety classifiers have been rewritten and retrained to better discern benign uses from potentially harmful or dual-use content.
- Anthropic is committed to developing trusted access pathways for frontier biology capabilities in professional research and drug development.