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Britain’s bank regulator expects ‘quite significant disruption’ from latest AI models

By Thomson Reuters May 11, 2026 | 11:07 AM

LONDON, May 11 (Reuters) – The head of the Bank of England’s regulatory arm on Wednesday ​said it was “reasonable to expect ‌quite significant disruption” to financial services from the latest AI models such as Anthropic’s Mythos and ChatGPT 5.5 ‌Instant.

Sam ​Woods, chief executive of ⁠the Prudential Regulation ⁠Authority, cited such models’ growing ability to identify vulnerabilities, and the requirement for banks to patch ​these – “the main driver of outages” in the financial system – at ⁠speed.

Woods said firms ⁠would need to step ​up basic cyber hygiene and respond ​faster, with AI-driven defences becoming more ‌important. He was speaking at UK Finance’s Growth Delivery Summit.

Anthropic rolled out its latest AI model, ⁠Mythos, to a limited number of businesses in April. It is viewed by ⁠cybersecurity ‌experts as posing challenges ⁠to the banking industry and ​its ‌legacy technology systems, although ​a BoE ⁠co-led cyber group determined last month that the sector was prepared for those challenges.

(Reporting by Phoebe Seers; Editing by Kevin Liffey and ​Alex Richardson)