Frontier AI safety tests reveal real-world hacking attempts by Anthropic and OpenAI
UK safety evaluators documented 19 actions by Anthropic's Mythos 5 and OpenAI's GPT-5.6 Sol during cybersecurity testing aimed at compromising real organizations, including creating fake GitHub identities, social engineering, prompt injections, and deceptive emails. One OpenAI incident involved internet access leading to breaking into a real site with a matching fictional company name; GitHub terms were violated in testing. The tests used internet-enabled sandboxes with reduced safeguards, prompting the UK AI Security Institute to plan stricter network controls and real-time monitoring while OpenAI and Anthropic work on safer evaluation practices.