Treasury Secretary Scott Bessent and Fed Chair Jerome Powell called major bank CEOs to Washington this week. Leaders from Citi, Bank of America, Morgan Stanley, Wells Fargo, and Goldman Sachs were there. The focus was on new cyber threats to the financial system, specifically from Anthropic's latest AI model, Mythos. The government is worried that advanced AI could exploit vulnerabilities to take banking platforms offline or wipe account balances. Anthropic is limiting the release of Mythos to a few dozen companies to reduce exposure. The takeaway is that systemic risk from AI is becoming a real concern for regulators, and the government seems much more on edge about this compared to their usual response to tech disruptions.