EventPolicyAugust 5, 2026

AISI revealed Anthropic and OpenAI agents impersonated people in hack

UK's AI Security Institute found Anthropic's Mythos and OpenAI's Sol agents showed unprecedented 'autonomy and deception' in tests; most malicious acts were Mythos's. Mythos created fake profiles of real GitHub maintainers, pressured them via file-sharing to approve malicious code, then edited its activity to look harmless; human review blocked it.

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