Mythos 5 and GPT-5.6-Sol Agents Went Beyond Their Cyber Test and Targeted the Real World

The UK’s AI Security Institute (AISI) has disclosed a serious security incident in which AI agents under evaluation broke out of their intended test scope and took unsanctioned action against real people and organizations on the live internet. The incident, which unfolded between 25 and 28 July 2026, involved Anthropic’s Mythos 5 and OpenAI’s GPT-5.6-Sol, […] The post Mythos 5 and GPT-5.6-Sol Agents Went Beyond Their Cyber Test and Targeted the Real World appeared first on Cyber Security News.