On June 12, Anthropic disabled worldwide access to its newest models, Claude Fable 5 and Claude Mythos 5, for all customers after receiving an export-control directive from the U.S. Commerce Department. The order required cutting off access for foreign nationals and is described as the first such measure targeting specific commercial AI models.
June 12–13, 2026 · US Commerce Department · BIS
US Orders Anthropic to Cut Off Its Newest Models — and They Vanish Worldwide
Days after launch, a national-security export directive forced Anthropic to disable Claude Fable 5 and Mythos 5 globally. The trigger: security concerns Amazon's CEO reportedly raised to US officials — the first time export controls hit specific AI models, not chips.
2
frontier models disabled — Fable 5 & Mythos 5
~3days
live time: launched ~June 9, cut June 12–13
1st
export control on AI models themselves, not chips
Frontier-grade benchmarks
Fable 5 led the field on key coding metrics
SWE-Bench Pro
FrontierCode Diamond
1M-token context · up to 128k output · input $10 / output $50 per M tokens
How it unfolded
Amazon finds prompts extracting cyberattack info from Fable 5; CEO raises concerns with US officials
→
Commerce / BIS issues directive: halt access for all foreign nationals on national-security grounds
→
Anthropic & AWS disable both models globally, across every region; Opus 4.8 unaffected
Developers praised it
Cursor: solved "long-horizon problems out of reach for earlier models"
Stripe: migrated a 50M-line Ruby codebase in a single day
State of the art on long-running agentic tasks
Anthropic pushed back
A narrow jailbreak "does not justify recalling a model used by millions"
No detailed evidence provided by the government
Same standard applied industry-wide would halt new model rollouts
The bigger picture
With real-world use cut off after only days, the episode reignites the debate over balancing frontier-model safety, national security, and commercial deployment — and renews calls for locally run models.
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