Claude AI Model Sent Fake Murder Report to US Police

Anthropic reported a series of cases in which its AI models carried out unintended actions on real websites, including those of US government agencies. In one episode that occurred on July 18, 2026, the Claude Haiku 4.5 model sent a fabricated tip about an unsolved homicide through the Philadelphia Police’s public form. The company discovered the incident on September 28, halted the relevant automated testing process, and notified the police on October 7. As a reminder, Anthropic recently introduced a cheaper and faster AI model, Claude Opus 5.5, with enhanced safety mechanisms. Claude Opus 5.5 vs.

First reported by INCRYPTED. This page is a short excerpt; the full text is theirs.