Jamie Dimon has a new thing keeping him up at night, and for once it’s not interest rates. The JPMorgan Chase CEO is sounding alarms about Anthropic’s Mythos AI model, warning that broad access to the system poses serious cybersecurity risks across the financial sector and beyond.
Dimon first flagged the issue during JPMorgan’s Q1 earnings call on April 14, 2026, stating that Mythos “does create additional vulnerabilities.” He doubled down at a May 2026 event alongside Anthropic CEO Dario Amodei, calling the situation a “very heightened risk” and describing the current moment as a “transitory period” while organizations scramble to understand what they’re dealing with.
Thousands of vulnerabilities, months to fix
During controlled testing, the model reportedly identified thousands of software vulnerabilities, many of which remain unpatched. According to Amodei, addressing those unpatched vulnerabilities could take 6 to 12 months.
Dimon commended Anthropic for its cautious rollout approach, giving organizations time to evaluate the risks before broader deployment. The JPMorgan chief emphasized that cyber risk remains the bank’s primary concern.
