The US Commerce Department under the Trump administration issued an export-control order on June 12, 2026, directing Anthropic to bar foreign nationals from its most advanced AI models, Fable 5 and Mythos 5, prompting the company to immediately suspend access to both models for all customers to comply.
June 12, 2026 · Commerce Department Directive
US Orders Anthropic to Block Its Top AI Models — So It Shut Them Off for Everyone
An export-control directive citing national security barred foreign-national access to Fable 5 and Mythos 5. To comply, Anthropic disabled both frontier models for all customers worldwide — the first known full shutdown of an already commercially deployed frontier model.
2
frontier models pulled — Fable 5 & Mythos 5
3 days
Fable 5 was generally available before being switched off
1st
full shutdown of a deployed frontier model
What it cost to lose: benchmark lead
FrontierCode Diamond (%) — the gap that made the shutdown sting
On SWE-Bench Pro the same model led too — 80.3% vs Opus 4.8's 69.2% and GPT-5.5's 58.6%.
The dispute, in one line
Washington flagged a jailbreak risk; Anthropic called it a "narrow, non-universal jailbreak" found in rivals' public models too.
SCOPE
Foreign nationals inside & outside the US — including foreign-national staff
PROCESS
Came abruptly; no specifics given, no technical-fact-based process
RESPONSE
Both models disabled for all; other models unaffected; talks ongoing in D.C.
Some understanding
A degree of sympathy on national-security grounds, with hopes for an early restoration. Executive talks in Washington point toward restoring access.
Developer concern
Losing a top model is significant — a regulation-vs-innovation dilemma. Some weigh switching to alternatives; access to frontier models now looks far from guaranteed.
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