Last updated: 2026-06-28T05:33:16.686Z

US Close to Restoring Anthropic's Fable 5 — Mythos 5 Already Back for Select Partners

The Trump administration is nearing a decision to restore public access to Anthropic's Claude Fable 5 model, which has been offline since a U.S. government export control order on June 12. In a parallel step, Commerce Secretary Howard Lutnick sent a letter on June 26 allowing Anthropic to restore its Mythos 5 cybersecurity model for over 100 trusted U.S. organizations. Fable 5's full public return could come as early as next week, pending final Pentagon and NSA sign-off.

What Happened

The Trump administration is close to allowing Anthropic to restore access to its powerful Claude Fable 5 model, which has been offline for 15 days due to national security concerns raised by the government. Sources familiar with the matter say the administration's limits on Fable 5 could be lifted as early as next week, with conversations between both parties expected to continue over the weekend.

Why It Matters

For developers and businesses, Fable 5's blackout was unprecedented — a top-tier AI model, already in users' hands, pulled offline by government intervention. When access vanished on June 12, developers found automated pipelines frozen mid-task, and companies raced to switch to rival models. In early testing, payments company Stripe had used Fable 5 to overhaul a 50-million-line codebase in a single day — a job that would have taken engineers over two months manually.

Mythos 5 Partially Restored

In a significant step on June 26, Commerce Secretary Howard Lutnick wrote to Anthropic stating that the company "has worked with the U.S. government to address risks associated with" the covered models and that "these efforts have yielded significant progress." The letter authorizes Anthropic to restore Claude Mythos 5 — its most capable cybersecurity model — for 100+ trusted U.S. organizations, including government agencies, Fortune 500 companies, and critical infrastructure operators.

Anthropic confirmed: *"We received notice from the US government that Mythos 5, our strongest cybersecurity model, can be redeployed to a small group of cyber defenders and infrastructure providers."*

Fable 5 Still Pending

Despite the Mythos 5 progress, Fable 5 — the public-facing version of the same underlying model — remains suspended. The Pentagon and National Security Agency still need to give their approval before Fable 5 can return to general use. Anthropic says it is continuing to work with the government to restore Fable 5 to standard subscription plans as quickly as possible.

Industry Ripple Effect

The government's restrictions also affected OpenAI, which limited the rollout of GPT-5.6 under administration pressure, releasing it first to a small set of vetted partners. Both Anthropic and OpenAI are pushing the administration to create a formal, transparent model review process, as envisioned by a June 2 executive order from President Trump.

Key Takeaway

After a tense 15-day standoff, the U.S.-Anthropic dispute appears to be thawing. Mythos 5 is back for critical infrastructure defenders; Fable 5 for the public is close — but not yet confirmed. Watch for an official announcement early this week.