A group of 100 firms, including Google, Microsoft, Anthropic and OpenAI, have signed an open letter calling on countries and organisations around the world to beef up their cyber defences before AI grows powerful enough to override them.

According to the BBC, the letter warns cyber-attacks which use AI will become both more widespread and more sophisticated in a matter of months.

The group says current status quo security measures won’t be enough.

The group also criticises what it says is the historic under-resourcing of security around critical infrastructure.

Other firms to have signed the letter include banks such as Capital One, payment processors MasterCard and Visa, and other major tech firms including Adobe, Oracle and IBM.

They call on governments to provide capable, defensive AI and testing to hospitals and water utilities, and on technology companies to aid such efforts.

The letter comes after a string of significant hacking and cybersecurity breaches have been made public.