The partnership between Anthropic and ENISA (Project Glasswing) represents the first formal 'security audit' of a frontier AI model by a multi-national regulatory body. This move signals that 'black box' AI development is no longer acceptable for critical infrastructure. The analysis of Mythos AI will focus on its 'autonomous cyber capability'—its ability to discover and exploit vulnerabilities without human intervention. This sets a high bar for OpenAI and Google, who will likely face similar pressure to open their models for sovereign inspection.