Claude Mythos AI unauthorised access claim probed by Anthropic

Anthropic is investigating a claim that a small group of people gained access to its Claude Mythos model - the cyber-security tool which the AI firm says is too powerful to release to the public.

"We're investigating a report claiming unauthorized access to Claude Mythos Preview through one of our third-party vendor environments," the company said in a statement.

It was in response to a Bloomberg report, external that users in a private forum managed to access the model without the normal permissions.

There is deep unease about Mythos' capabilities - though the UK's top cyber official has said advanced AI tools could be a "net positive" if the technology was secured from misuse.