The U.S. Department of Commerce on June 30, 2026 (U.S. time) formally lifted the export controls it had imposed on Anthropic's AI models "Claude Fable 5" and "Mythos 5." The roughly 18-day worldwide access suspension that began on June 12 has ended, with access restored progressively from July 1.
June 30, 2026 · U.S. Commerce Department
U.S. Lifts Export Controls on Anthropic's Most Powerful AI Models
After an 18-day worldwide suspension, restrictions on Claude Fable 5 and Mythos 5 were withdrawn. Anthropic began restoring global access on July 1 following commitments on security detection, government cooperation and reporting of malicious activity.
18
days the models were paused worldwide
1M
token input context window
2
models cleared to ship without a license
The 18-Day Standoff
Jun 9
Fable 5 & Mythos 5 launch
→
Jun 12
BIS directive bars foreign-national access; Anthropic pauses both models
→
Jun 30 – Jul 1
Controls withdrawn; access restoration begins
Two Models, Two Access Tiers
Claude Fable 5
GENERAL RELEASE
Available on Claude.ai, API, AWS Bedrock
Added safety classifiers
Agentic, reasoning & vision use
Claude Mythos 5
LIMITED · PROJECT GLASSWING
Trusted partners only
Some guardrails removed
Cyber-defense focus
Why It Was Controlled
Red-team testing flagged very high cybersecurity capabilities — the rationale for the national-security restrictions.
Discovering and exploiting zero-days in major operating systems and browsers
Writing Linux privilege-escalation exploits from CVEs
Jailbreak and misuse risk from removed guardrails in the Mythos-class tier
STRENGTHS NOTED
Rated "very strong for demanding reasoning and long-horizon agentic work," with state-of-the-art claims in software engineering and vision.
CAVEATS NOTED
Frequent guardrail activation and fallback behavior observed, with the public Fable 5 falling back via safety classifiers.
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