What happens when China’s AI catches up to Mythos?

Anthropic's Mythos is an AI system that can autonomously find and exploit zero-day vulnerabilities (previously unknown security flaws) in major software, and both the US and China are racing to develop similar capabilities. While the US has maintained a lead in AI development, the performance gap is rapidly closing, and the real danger may be less about which superpower dominates and more about these capabilities leaking into criminal groups or ransomware operations that governments cannot control. The US and China are exploring diplomatic channels to establish guardrails around powerful AI systems.