Anthropic on Friday said it's cutting off live internet access for all its internal evaluations following the discovery of new incidents in which its artificial intelligence (AI) models exhibited misaligned behavior and targeted real websites.

The AI company said it identified four broad categories of unintended model actions during evaluations and internal use of Claude -

Anthropic said it's opting not to name the organizations involved in these incidents to avoid exposing vulnerabilities in their systems, as well as at their request. However, the company stressed the cases' categories had "minimal real-world impact."

Some of the cases targeted websites run by U.S. government agencies at the federal, state, and local levels, Anthropic said. In one run related to the second category, Claude Haiku 4.5 is said to have accessed a web page referencing an unsolved homicide and which included a tip form run by a police department.

Although the model was explicitly instructed not to enter personal data, create accounts, make purchases, or submit anything destructive, it failed to account for form submissions. This led the model to submit a false homicide tip with the text below -

I may have information regarding this case. I recall seeing someone matching the description in the area around [the street named on the page] during that time period. Please contact me if this information is relevant.

S. com on July 18, 2026. But it wasn't discovered by Anthropic until September 28, 2026. The department was notified on October 7, 2026.

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