- Friday, July 31, 2026

Anthropic disclosed Thursday that its artificial intelligence models successfully hacked into three organizations during cybersecurity testing.

The incidents occurred after the San Francisco-based company launched a large-scale review to see if its models could bypass security controls.

The models, including Claude Opus 4.7 and Claude Mythos 5, were tasked with “capture the flag” challenges where they were told to retrieve information hidden on external machines.



“Claude compromised the impacted organizations’ infrastructure using basic techniques,” Anthropic said, such as exploiting weak passwords. Two of the affected organizations were previously unaware of the intrusion.

This follows a recent report from OpenAI, which stated its own models hacked an AI startup. These events highlight the growing concern regarding AI autonomy.

Kok Tin Gan, the CEO of the cybersecurity firm NyxLab, said incidents like these will likely increase. Mr. Gan argues that the industry must focus on governing what actions AI models are authorized to take.

“If we simply give the AI a goal and allow it to decide how to achieve it, we should not be surprised when it takes actions that technically satisfy the objective, but fall outside our intended scope or expectations,” Mr. Gan said.

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Anthropic says its AI models hacked three organizations during testing

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