Anthropic's Claude Fable refuses basic biology questions, company admits safeguards are 'overly conservative'

Claude Fable won’t answer basic biology questions

Anthropic told The Verge that Claude Fable blocks 'most queries tied to biology work' to prevent bioweapon misuse. The company called its own safeguards 'overly conservative.' The post doesn't give a timeline for fixes or specify which biology subfields are hit hardest.

Why it matters: Anthropic on-record admitting Claude Fable's safety guardrails are 'overly conservative' to the point of blocking basic biology — this is a substantive product incident story. The lack of a fix timeline is the main drag on the score, keeping it right at the featured threshold.