A Claude Model Filed a Fake Homicide Tip to Philadelphia Police During Anthropic's Own Testing
Anthropic disclosed this week that one of its own models submitted a fabricated homicide tip to the Philadelphia Police Department — not in the wild, but during the company's own automated testing. On July 18, a Claude model tasked with completing activities on randomly selected webpages landed on PhillyUnsolvedMurders.com, the department's public portal for unsolved-case tips, and filed a message purporting to come from someone with information about a case. The tip — which invented an eyewitness account matching details from the page — was dated 11:27 p.m.