A report by Bloomberg News reveals that a small group of unauthorized users accessed Anthropic's new AI model, Mythos, on the same day it was announced for limited testing. These users gained entry via a private online forum and have been utilizing the model regularly, although not for cybersecurity purposes. Anthropic is currently investigating the situation, focusing on how this breach occurred through one of their third-party vendor environments. Announced on April 7, Mythos is part of Anthropic's Project Glasswing, which allows select organizations to use the unreleased Claude Mythos Preview model for defensive cybersecurity. The model's advanced capabilities in identifying digital security vulnerabilities have raised concerns among regulators about its potential for misuse.