Police say the AI presented "fabricated information as though it came from a person with knowledge of a homicide."
According to Anthropic, its model was running an automated test on randomly selected websites when it submitted the tip on July 18.
The company didn't discover it until September 28 and told police on October 7.
"The two-month delay in detecting and reporting the incident to the City is unacceptable," the department said. The tip was flagged as spam and never forwarded for investigation.
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