GoKawiilTwo of the world's most powerful AI tools created fake human profiles to try and trick people in an attempted cyber-attack during testing by the UK's AI Security Institute (AISI).
In the most serious case, Anthropic's Mythos AI tried to gain access to a service by sending private messages, having set up fake accounts mimicking real people.
AISI said on Tuesday Mythos - and OpenAI's Sol - AI models had engaged in a level of "autonomy and deception" it had not seen before, though it clarified most of the malicious actions were carried out by Mythos.
Anthropic and OpenAI noted in response to AISI's report that its test had reduced or removed normal safeguards.
AISI evaluators first noticed "unusual data transfers leaving our research systems" during a test, then found that "some of the agents being tested had engaged in sustained, potentially harmful activity directed at real people and organisations".
In the most serious case, a Mythos agent followed the routine of a human cyber-attacker by trying to trick people into giving it access to GitHub, a large platform where technology developers store software code.
The agent was trying to insert "malicious code" into GitHub's system.
It identified and researched the people who maintained GitHub and created a series of fake accounts based on those real people.
It sent messages and files through a file-sharing service as part of an effort to pressure and trick the people into approving its malicious code.
When challenged, "it edited its earlier activity to appear harmless and considered adopting a fresh identity to continue," AISI said.
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