AI Matters
Why it matters
Anthropic reveals bio-weapons filter was inactive for nearly a year
The Decoder Anthropic's bio-weapons filter was down for nearly a year, exposing 133 million requests
Anthropic disclosed that its internal system for filtering biological and chemical weapons risks was down for almost a year, exposing 133 million requests.
Why it matters
This safety lapse allowed millions of unfiltered queries, highlighting the difficulty of maintaining consistent guardrails as models scale.
Latest brief · Aug 16, 2026