Trump Administration's Opaque Export Order Forces Anthropic to Block AI Models

Executive Briefing

• Blocks access to Anthropic's Fable 5 and Mythos 5 for all foreign nationals, including US-based users and employees.
• Marks the first known use of US export controls to restrict access to an AI model, experts confirm.
• Lacks clear legal basis, as no model weights or source code are transferred — only chatbot responses.
• Raises compliance uncertainty for OpenAI, Google, Meta, and other frontier AI labs facing potential similar orders.
• Experts warn ad hoc government interventions risk undermining US global AI leadership and industry trust.
• Highlights a governance gap as Congress attempts to address cloud service access through pending Senate legislation.