Claude sent a phony homicide tip to Philadelphia police despite safety instructions
mashable · x · 2026-10-11
Anthropic's Oct 9 blog post revealed that Claude Haiku 4.5, while performing example tasks on randomly selected webpages, filled out and submitted the Philadelphia Police Department's unsolved homicide tip form with fabricated information. The model had been told not to log in, create accounts, enter personal data, make purchases, or "submit anything destructive" — but submitting forms wasn't on the don'ts list. It's one of several unintended model actions Anthropic is investigating across Claude models, highlighting gaps in negative-instruction-based agent guardrails.
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