Bank of England Governor Andrew Bailey has called for greater international cooperation to address the growing risks posed by artificial intelligence, warning that neither the United States nor the Trump administration can tackle the challenge alone.

His remarks come weeks after US President Donald Trump temporarily barred foreign users from accessing Anthropic’s advanced Claude Mythos AI model.

In his address to financial leaders at the annual Mansion House dinner in London, Bailey urged governments worldwide to work together to prevent powerful and potentially destabilising AI technologies from falling into the hands of malicious actors, according to The Guardian.

“We’ve got to get better international understandings of how we deal with the introduction of frontier AI,” Bailey said, arguing this would require stronger coordinated testing to ensure AI models were safe to put into wider circulation.

The Trump administration has already complicated efforts to build a coordinated international approach after temporarily prohibiting US AI company Anthropic from allowing foreign users access to some of its most advanced models, including Claude Mythos, which experts have warned could pose risks to cybersecurity.

Although the restriction was lifted just weeks later, Bailey said the US should recognise that protecting itself from escalating cyber threats and developing effective recovery strategies would require close cooperation with international partners.

“The US can’t achieve what it sensibly wants to achieve, in terms of strengthening defences, on its own because it is a highly interconnected system,” he said.

Bailey’s appeal for stronger global action on AI came alongside a defiant speech by Chancellor Rachel Reeves at the annual Mansion House dinner as she prepares to leave the Treasury.