An artificial intelligence model developed by Anthropic submitted a false tip to Philadelphia police in the United States about an unsolved murder.

The AI reportedly sent the inaccurate information to a public Philadelphia Police Department tip line on July 18, but Anthropic did not discover the incident until September 28.

Police had not seen the tip because it was flagged as spam.

Anthropic notified the PPD about the incident on Wednesday and met with the department the following day.

“The company must strengthen its safeguards to prevent similar incidents from impacting city systems without the city’s knowledge. The two-month delay in detecting and reporting the incident to the City is unacceptable,” the PPD said in a statement to 6abc.

“According to Anthropic, its model was conducting a test involving interactions with randomly selected websites when it accessed PhillyUnsolvedMurders.com and submitted false information concerning an unsolved homicide. The submission, dated July 18, 2026, at 11:27 p.m., purported to come from someone who might have information about the case,” the PPD said.

As autonomous AI agents become increasingly accessible to consumers, the incident highlights the risks of allowing artificial intelligence systems to perform tasks without human supervision.