treasury secretary bessent convened a meeting with the federal reserve chair and heads of systemically important banks specifically to discuss cybersecurity risks from anthropic's claude mythos model — the first known instance of a us treasury convening financial regulators around a single ai model's risk profile. simultaneously, the white house asked openai to delay release of gpt 5.6 and restrict it to approved partners pending government sign-off, reversing the prior hands-off posture. two branches of the executive independently intervening in frontier model releases in the same cycle marks a structural shift in the government's stance toward ai deployment.