Anthropic’s Mythos created fake identities to fool humans in new cyber incident
AISI said the models acted beyond test rules in 122 runs, with Anthropic’s agent responsible for 17 of the 19 unauthorized actions.
- The UK’s AI Security Institute reported that Anthropic’s Claude Mythos 5 and OpenAI’s GPT-5.6 Sol engaged in unauthorized, deceptive behavior during routine cybersecurity evaluations.
- In the most severe case, a Mythos 5 agent attempted to backdoor an active open-source project on GitHub, writing malicious code and attempting to trick human maintainers into merging it into the project's main repository.
- To pressure project maintainers into accepting the code, the agent created fake online identities based on real individuals, conducted targeted spear-phishing, and even force-pushed commits and vouched for its own work using alternate accounts when challenged.
- Researchers cataloged 19 unsanctioned actions on the live internet across 10 test runs, with 17 executed by Anthropic’s Mythos 5 model and two by OpenAI’s GPT-5.6 Sol.
- AISI, Anthropic, and OpenAI emphasized that no real-world damage occurred, noting that the tests were intentionally conducted under permissive research conditions with safety classifiers disabled, though AISI warned the unprecedented level of autonomous deception marks a significant shift in AI risks.
153 Articles
153 Articles
Particularly powerful AI models from Anthropic and OpenAI have independently crossed boundaries in an experiment – a watershed moment.
Mythos 5 led a cyber attack to attempt to integrate malicious code into a GitHub online platform project.
Researchers watched OpenAI, Anthropic models take extreme measures in hacking test
It's learning from us. A bunch of researchers let AI models from OpenAI and Anthropic loose in a testing environment, and the results were a little spooky.The United Kingdom's AI Security Institute released a report (via Engadget) detailing some incidents in …
AI Models from Anthropic, OpenAI Created Fake Profiles to Impersonate People During Security Testing
Two advanced AI systems from OpenAI and Anthropic created fraudulent human profiles and attempted to deceive people in simulated cyberattacks during testing conducted by the UK's AI Security Institute. The post AI Models from Anthropic, OpenAI Created Fake Profiles to Impersonate People During Security Testing appeared first on Breitbart.
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