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White House demands zero-jailbreak standard for Fable 5 return, a bar experts say no AI model can meet

· by Pondero Newsdesk

The short version

New reporting reveals the Trump administration has set a jailbreak-elimination condition for Fable 5's reinstatement that cybersecurity researchers call technically impossible for any current AI system.

White House demands zero-jailbreak standard for Fable 5 return, a bar experts say no AI model can meet

New WIRED reporting reveals the condition the Trump administration set for lifting the Fable 5 ban: Anthropic must eliminate all jailbreaks from the model before it can return to market. Cybersecurity researchers told WIRED and Cybernews that standard is technically impossible for any current large language model.

What happened

The ban on Fable 5 and Mythos 5 entered its ninth day on June 20. WIRED reported on June 18 that the White House delivered a clear message to Anthropic: proactively test all frontier models and remove every jailbreak before any relaunch. The demand grew out of a two-step sequence, per WIRED.

First, U.S. officials grew concerned about SK Telecom, a South Korean carrier they alleged had ties to China, after the company received access to Mythos through Anthropic's Project Glasswing cybersecurity program. The government asked Anthropic to revoke SK Telecom's access specifically. Anthropic complied. Second, Amazon researchers separately flagged Fable 5 vulnerabilities to Treasury Secretary Scott Bessent. After seeing those findings, the administration concluded self-regulation by Anthropic was insufficient and issued the June 12 export control directive pulling both models for all foreign nationals, inside and outside the United States.

Before the ban went into effect, David Sacks, who co-chairs the President's Council of Advisors on Science and Technology, gave Anthropic a choice: fix the jailbreaks or voluntarily withdraw the model. CEO Dario Amodei declined both options, per WIRED. The administration then issued the formal directive.

Why the zero-jailbreak standard creates an impasse

Security researchers pushed back on the White House's framing almost immediately after WIRED's report.

Martin Riley, CTO at cybersecurity firm Bridewell, told Cybernews: "A jailbreak is not a bug in a discrete piece of code. It is an adversarial input to a system whose entire value comes from being open-ended and flexible." With traditional software, engineers can define expected inputs and close identified gaps. With a frontier model, the input space is effectively infinite. "You cannot enumerate every attack path, so you cannot prove the absence of one," Riley said.

Oliver Simonnet, lead cybersecurity researcher at CultureAI, told Cybernews that AI companies including Anthropic have already invested heavily in safety training, adversarial testing, red teaming, and monitoring. "While developers can reduce the success rate of jailbreaks, it is currently unrealistic to guarantee that an AI model will remain completely jailbreak-proof forever," Simonnet said.

Anthropic's own June 12 statement took a similar position. The company said it had reviewed a demonstration of the jailbreak cited by officials, found it narrow and non-universal, and noted it had identified comparable capabilities in other publicly available models including GPT-5.5. Anthropic said the vulnerabilities did not justify pulling a model deployed to hundreds of millions of people, per its statement.

The underlying disagreement is whether a model with narrow, non-universal jailbreaks poses the kind of national security risk that justifies an export control. The White House's position is yes. Anthropic's position is no.

What to watch next

Two concrete milestones sit close together. The refund window for subscribers who joined or upgraded between June 9 and June 14 closes on June 20. If Fable 5 is not restored by then, Anthropic manages refund processing alongside an unresolved regulatory dispute.

Congress has also entered the picture. Lawmakers sent a letter on June 18 demanding answers from Commerce Secretary Howard Lutnick on the legal basis for the export control directive. A formal Bureau of Industry and Security statement confirming the directive has been modified or lifted would be the clearest signal the standoff is ending. Until that happens, the ban continues.

Sources