Anthropic Fable 5 AI Model May Return Next Week After US Government Security Review

TLDR

• The Trump administration is close to allowing Anthropic to restore its Fable 5 AI model after a 15-day shutdown
• The Pentagon and NSA still need to approve the release before it goes live
• The Commerce Department already restored limited access to Mythos 5 for trusted users on Friday
• Commerce Secretary Howard Lutnick and Treasury Secretary Scott Bessent helped ease the dispute
• Both Anthropic and OpenAI are pushing for a formal government review process for advanced AI models

Anthropic’s Fable 5 AI model could be back online as early as next week, according to a report from Axios. The Trump administration is reportedly nearing a decision to lift restrictions that have kept the model offline since June 12.

The model was pulled after the U.S. government issued an export control order, citing national security concerns. The suspension left developers and businesses without access to a tool many had started relying on.

Axios, citing officials familiar with the discussions, said restrictions could be lifted as soon as the coming week. Conversations between Anthropic and the government are expected to continue over the weekend.

Not every agency has signed off yet. The Pentagon and the National Security Agency still need to approve the release. Other government departments have already concluded the model can safely return to public use.

Commerce Secretary Howard Lutnick and Treasury Secretary Scott Bessent played key roles in moving the process forward. Lutnick wrote in a letter to Anthropic that the company “has worked with the US government to address risks” associated with both models.

Mythos 5 Already Partially Restored

On Friday, the Commerce Department allowed Anthropic to restore access to Mythos 5 for a limited group of trusted users. Mythos 5 is the more advanced of the two models and has never been broadly available to the public.

Both Fable 5 and Mythos 5 are built on the same underlying AI model. The key difference is that Fable 5 is designed for wide public use, while Mythos 5 has additional safeguards to reduce misuse risks like cyberattacks or biological threats.

Why Fable 5 Mattered to Developers

Before the June 12 shutdown, Fable 5 had become popular with software developers for its coding and reasoning capabilities. Payments company Stripe reportedly used it to overhaul a 50 million-line codebase in a single day, a job that would have taken engineers over two months manually.

After the suspension, automated coding tasks were halted and some businesses moved workloads to competing AI systems, including lower-cost Chinese models.

The shutdown also came after a broader dispute between Anthropic and the Trump administration. Defense Secretary Pete Hegseth had previously called Anthropic a “Supply-Chain Risk to National Security.” The expected return of Fable 5 marks a shift in that relationship.

One administration official told Axios that Anthropic “has worked positively with the government.”

Push for a Clearer Process

Both Anthropic and OpenAI are pushing the Trump administration to set up a formal review process for advanced AI models before release. This follows President Trump’s June 2 executive order introducing voluntary government vetting for powerful AI systems.

OpenAI received permission Friday for a limited preview of GPT-5.6. In a blog post, the company said it doesn’t believe government access processes “should become the long-term default.”

Anthropic has also called for a process that is “transparent, fair, clear, and grounded in technical facts.”

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