U.S. Treasury Secretary Scott Bessent and Federal Reserve Chair Jerome Powell convened an urgent closed-door meeting with top Wall Street bank CEOs on Tuesday at the Treasury Department headquarters to address emerging cybersecurity threats posed by a powerful new artificial intelligence model.

The session focused on Anthropic’s recently launched “Mythos” AI system, which regulators warned could significantly elevate cyber risks to the financial sector. Attendees included CEOs from major systemically important banks such as Citigroup’s Jane Fraser, Morgan Stanley’s Ted Pick, Bank of America’s Brian Moynihan, Wells Fargo’s Charlie Scharf, and Goldman Sachs’ David Solomon. JPMorgan Chase CEO Jamie Dimon was unable to participate. The meeting was arranged on short notice while many executives were already in Washington for other engagements.

According to sources familiar with the discussions, Bessent and Powell emphasized the need for banks to recognize potential vulnerabilities introduced by advanced AI models like Mythos and to strengthen their defensive measures proactively. Anthropic had limited the initial release of the model to a select group of companies due to concerns over its capabilities, and the firm had previously briefed U.S. officials on its offensive and defensive cyber features. No official readout or statements were issued following the talks.

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The core concern centered on Mythos’s reported ability to rapidly identify and exploit weaknesses in every major operating system and web browser when directed by a user. Regulators viewed this as a harbinger of a new era of sophisticated cyber threats, particularly if such tools fall into the hands of malicious actors. The discussion marked a departure from routine high-level conversations on monetary policy or economic indicators, highlighting instead the intersection of cutting-edge technology and financial system stability.

This gathering underscores broader worries about AI-driven risks to critical infrastructure. Systemically important banks, whose health is vital to the global financial system, were specifically targeted for the briefing. Anthropic’s cautious rollout and ongoing engagement with government stakeholders reflect industry awareness of the model’s dual-use potential in both cybersecurity defense and offense.

The meeting reflects heightened regulatory vigilance amid rapid AI advancements. While details remain limited due to the private nature of the session, it signals coordination between fiscal and monetary authorities to prepare the banking sector for evolving technological challenges that could impact operational resilience and broader economic security. Experts anticipate continued dialogue between policymakers, regulators, and financial institutions as similar AI capabilities emerge.

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