Claude Mythos: The 'Forbidden' Work in AI Security and a Comprehensive Comparison with Mainstream Models
On April 7, 2026, Anthropic officially released its most powerful AI model to date—Claude Mythos Preview. Described internally as a "generational shift," the model delivers breakthrough advances across multiple areas including code repair, cybersecurity, and reasoning. Because of its potent vulnerability-discovery capabilities and the attendant security risks, Anthropic adopted an unprecedentedly cautious approach: the model is not publicly accessible and is available only via the Project Glasswing cybersecurity initiative with limited access granted to more than 40 tech giants. This article offers a comprehensive comparison of Claude Mythos against mainstream models such as GPT-5.4 and Gemini 3.1 Pro across technical capability, safety features, and market positioning, and analyzes how this powerful-yet-dangerous AI could reshape the industry's competitive landscape.