Post-Mythos Cybersecurity: Keep calm and carry on

While Claude Mythos generated significant industry alarm as a potential game-changer in AI-powered vulnerability discovery, the technical reality reveals a more measured threat: it represents a gradual improvement over existing models with capabilities primarily accessible to well-resourced threat actors, not a revolutionary breakthrough. The actual competitive advantage lies in computational scale (requiring millions in token budgets) rather than fundamental new exploitation techniques, and comparable results can be achieved with cheaper open-source models, though with reduced accuracy in proof-of-concept generation. For CIOs and security leaders, this means refocusing efforts on mature security fundamentals and SOC maturity rather than treating this as an unprecedented existential risk.