Bottom line: US authorities force Anthropic to immediately disable its two most powerful Claude models citing national security concerns.
The US government has ordered Anthropic to restrict access to advanced models Claude Fable 5 and Mythos 5 for foreign users. Anthropic stated both models will be disabled for all users.
The US government issued Anthropic an administrative order on Friday evening at 5:21 PM ET to suspend access to Claude Fable 5 and Mythos 5 for foreign nationals – regardless of whether they are located inside or outside the United States. The measure was justified on national security grounds.
Anthropic subsequently announced that both models will be “abruptly” disabled for all users. The order marks a significant escalation in regulatory oversight of cutting-edge AI systems in the US and presents organizations with considerable operational and business challenges.
For Chief Data Officers and security officers, this measure is relevant as it demonstrates how quickly government interventions can affect productive AI infrastructure. Organizations relying on Claude models for business-critical processes must prepare for immediate outage scenarios and develop contingency plans for AI dependencies.
Source: thehackernews.com · Published 13 June 2026
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