Europe Scrambles for Oversight as Anthropic Tightens Mythos Access

European regulators say they’re largely sidelined as Anthropic restricts Mythos to a handful of U.S.-based partners for security testing; the UK’s AI Security Institute has tested it, while EU agencies report limited access, exposing gaps in European oversight of frontier AI and reigniting calls for global norms and stronger EU rules like the AI Act and Cyber Resilience Act.