
The Trump administration lifted export controls on Anthropic's Claude Fable 5 and Mythos 5 AI models after the company agreed to add a security guardrail that blocks access to certain restricted capabilities and routes those requests to a less-advanced model.
The guardrail extends an existing protection to requests related to a specific behavior identified in an Amazon paper that researchers had found users could exploit.
However, Anthropic still faces a separate supply chain risk designation from the Defense Department with no clear path to removal.
What happened
The Trump administration removed export restrictions on Anthropic's Claude Fable 5 and Mythos 5 AI models after the company agreed to extend a security guardrail. The new safeguard blocks users from accessing certain restricted capabilities related to cybersecurity and biology, routing those requests to the less-advanced Opus 4.8 model instead.
Why it matters
The export controls had effectively taken Fable 5 offline after the administration learned that users could bypass restrictions by asking the model to fix code rather than identify security issues. Commerce Secretary Howard Lutnick's decision to restore access signals that the administration believes Anthropic's new safeguards are robust enough to address those concerns, though the company still faces a separate designation as a supply chain risk from the Defense Department.
What to watch
While Anthropic has resolved the Commerce Department impasse, Defense Secretary Pete Hegseth has indicated there is no clear path to lift his February 28 order designating the company a supply chain risk, meaning the company's regulatory challenges with the administration are not entirely resolved.
Ask the AI about this article →
For example, today's edition would include:
AI-summarized, only the topics you pick — one digest a day via Email, Slack, or Discord.
Free · takes 30 seconds · unsubscribe anytimeWhat is AIToday? →
Ask AI anything about this article. Q&As are published on this page for other readers too.
Phonely Ltd. launched Alma, a large language AI model built for voice agents and trained on over 10 million re…
Aranya Inc., a startup founded last year, launched today with $11 million in funding
CBTS Technology Solutions LLC launched Forge Agents, a platform that turns a plain-language job description in…
Imec CEO Patrick Vandenameele said at SEMICON Taiwan 2026 that the Belgian research center is broadening its c…

Alphabet's AI Overviews now reach over 2.5 billion monthly users through Google Search, and its ad business ge…

Sarah O’Connor's book 'We Are Not Machines' explores how mechanization and AI have transformed the workforce…
