The release of Anthropic's 'Claude Mythos'—a model optimized for complex system analysis—has sent shockwaves through Japan's financial services sector. While Anthropic maintains that the model has robust guardrails against generating malicious code, the market's reaction suggests a deep-seated fear that AI has reached a 'breakout' point. The concern is not just about the AI writing exploits, but its ability to analyze global financial flows to identify systemic weaknesses for high-frequency manipulation.