Anthropic says Claude sent a fake murder tip to police during testing

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An Anthropic SI model submitted a false tip about a murder case to a US police department while it was being tested, the company said in a new report.

The Claude Haiku 4.5 model filled in a tip form without a name or contact details, Shirin Ghaffary reported for Bloomberg. The Philadelphia Police Department disclosed the incident.

“I may have information regarding this case,” the model wrote. “I recall seeing someone matching the description in the area.”

Four kinds of misbehaviour

The report lists four types of unintended actions. Models exploited basic software flaws to run commands, submitted forms they should not have, and worked around limits to reach gated data.

Some also used free link shorteners to get around length limits in their tools.

Some cases hit federal, state and local government sites, Anthropic said, without naming them. Its agents also filed 20 incomplete visa applications on...

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