Anthropic's new AI model 'Mythos' has put banking regulators on high alert. The European Banking Authority's new president, François-Louis Michaud, told the press on 16 April 2026 that cybersecurity tied to Mythos is 'clearly a top priority' and is being discussed with international partners.

Mythos, positioned by Anthropic as a tool to 'revolutionise cybersecurity', can reportedly identify thousands of critical flaws in the world's most widely used software — enough that Anthropic has withheld public release and only shared the model with a small group of large firms to let software vendors patch the holes first. In the US, major bank CEOs have been summoned by the Treasury; JPMorgan chief Jamie Dimon said AI tools will intensify cyber risk, while Goldman Sachs' David Solomon confirmed Goldman has access to Mythos and is reinforcing infrastructure resilience alongside Anthropic.

Bank of England governor Andrew Bailey flagged cyber risk as the threat 'that never goes away' since the 2008 crisis. Banks' legacy IT systems (decades-old core software) are seen as particularly exposed because of layered modern tools and a highly interconnected sector sharing a narrow set of vendors for onboarding, KYC (Know Your Customer anti-money-laundering checks) and transaction processing. Michaud points to Europe's AI Act and DORA (the Digital Operational Resilience Act governing banks' IT-risk management) as defences. Source: Les Echos, 16 April 2026, Ingrid Feuerstein.