Fable 5 updates biology safeguards, cutting biology-related fallbacks by ~85%
Developers updated Fable 5’s biology safety classifiers to substantially reduce false positives; internal testing shows about an 85% reduction in biology-related fallbacks, so users will experience far fewer automatic switches to the less-capable Opus 5 for everyday health, educational, and some clinical queries. The system still routes requests in high-risk dual-use domains (e.g., virology, toxicology, molecular design) to Opus 5, and the team says it will use trusted-access pathways before enabling frontier biology capabilities more broadly.