Business & Economics

AI Gatekeepers Emerge: Anthropic’s Mythos Spurs Restricted-Release Models and Workplace AI Mandates

After Anthropic confined its Claude Mythos model to about 50 vetted users in April 2026, rival labs, regulators and employers quickly shifted toward ‘restricted-access yet compulsory-use’ policies for cutting-edge AI systems.

By Underlines Team

Focusing Facts

  1. Anthropic’s Project Glasswing limits Mythos access to roughly 50 organizations, citing OS and browser zero-day exploits, announced April 2026.
  2. OpenAI released GPT-5.4-Cyber and GPT-5.5-Cyber only to authorized security researchers one week after Mythos’ announcement.
  3. China’s registry shows 868 filed and 530 registered generative AI services as of April 2026 under a mandatory CAC review system.

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