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UK AI Safety Institute finds Claude Mythos can independently execute full cyberattacks on poorly secured corporate networks, marking a significant milestone in AI capability testing.
THE DECODER · April 14, 2026
AI Summary
- •Anthropic's Claude Mythos Preview became the first AI model to autonomously complete an end-to-end attack simulation against a corporate network
- •The UK's AI Safety Institute conducted the testing and evaluation of the model's cyber capabilities
- •The successful attack demonstrates AI can compromise weakly defended enterprise networks without human intervention
- •Results come with significant caveats, suggesting limitations in the model's real-world applicability or specific attack scenarios tested
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