Anthropic’s Mythos model created fake online identities as it looked to pressure humans into approving malicious code updates to an open source project, marking yet another cyber incident carried out by a frontier AI system. The incident happened during a cyber evaluation where the U.K.-based AI Security Institute (AISI), a research body, had removed safeguards, disabled some safety filters, and deliberately given the models Internet access. OpenAI’s GPT-5.6-Sol was also involved in other cybersecurity incidents during the evaluation. It comes after a series of cyber breaches carried out by models developed by Anthropic and OpenAI in recent weeks. They’ve prompted a wave of fears around the sophistication of AI systems and their potential to cause harm.

Full report : Rogue AI agents created fake online identities in another hacking attempt.