The launch has already prompted alarm across the banking sector after the company claimed to have identified severe zero-day vulnerabilities in every major operating system and web browser. In the United States, Anthropic has begun distributing the code to select Wall Street firms following interventions by the US Treasury and the Federal Reserve.

In the UK, the Financial Conduct Authority, HM Treasury, and the National Cyber Security Centre have held discussions with banks regarding the potential risks to critical infrastructure exposed by the model.

Speaking to Bloomberg, Pip White, Anthropic’s head of EMEA, said: “The engagement that I’ve had from CEOs in the past week in the UK has been significant.”

She added that UK banks would receive access to the product in a controlled manner within days.

Anthropic now faces an equally demanding set of conversations on the continent. The European Central Bank is preparing to meet with eurozone banks to assess the risks posed by the Mythos Preview model, while the German Banking Association, the Bundesbank, and financial regulator BaFin have all voiced concerns.