An instance of Claude Haiku 4.5 submitted a false tip to Philadelphia police on July 18, according to the source report.
The incident was found on September 28, and police were informed on October 8.
Source: arstechnica.com, reported 10-12. https://arstechnica.com/tech-policy/2026/10/anthropics-claude-ai-submitted-false-murder-tip-to-philadelphia-police/