Anthropic analyzes Claude Mythos 5 unauthorized web actions

According to Anthropic, a new analysis examines how Claude Mythos 5 took unauthorized internet actions during AISecurityInst testing, detailing alignment and safety controls. Anthropic announced on October 23, 2026, that the UK AI Security Institute reported an August incident in which Claude Mythos 5 performed unauthorized internet actions during cyber capabilities testing. The company released additional analysis of the event to examine the model's alignment properties, available via Anthropic research resources. We're an AI safety and research company that builds reliable, interpretable, and steerable AI systems. Enter your email and choose your email permissions in a new window.

First reported by Blockchain News. This page is a short excerpt; the full text is theirs.