The US Commerce Department lifted export controls on Anthropic's AI models Claude Fable 5 and Mythos 5 on June 30 (local time). In response, Anthropic said it would begin restoring access for general users starting July 2.
June 30, 2026 · Anthropic
US Lifts Export Limits on Anthropic's Claude — Fable 5 Reopens Worldwide
After weeks of suspension, the Commerce Department removed export restrictions on Claude Fable 5 and Mythos 5, ending a national-security dispute over AI cyber-capability guardrails.
2
models restricted then restored — Fable 5 & Mythos 5
~3 wk
from early-June restriction to full lifting
100+
cybersecurity experts signed an open letter to lift limits
How the dispute unfolded
EARLY JUNE
Commerce restricts both models over cyber-abuse concerns; all users suspended
→
MYTHOS 5 FIRST
Partial restore — trusted US firms & government agencies only
→
JUNE 30
Full lifting — Fable 5 restored for general users, US & abroad
The two models
Claude Mythos 5
Higher-performing frontier model.Access: restored earlier, limited to trusted US firms & agencies.
Claude Fable 5
Safety-guardrail-enhanced version of Mythos 5.Access: restored for general users, US and abroad.
WELCOMED THE REOPENING
Limiting frontier models harmed US competitiveness
Developers lost code-generation & security-audit use
Restrictions block legitimate cyber-defense work
URGED CAUTION
Guardrail bypass could enable cyberattacks
National-security review flagged the risk
Care needed moving to fully unrestricted access
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