The White House lays it on the line for Anthropic: Don't expect to rerelease Fable 5 unless the "jailbreak" issue is resolved.

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The Trump administration has issued a final ultimatum to Anthropic regarding security vulnerabilities in its flagship AI model, but independent security experts warn that the White House's demands may be fundamentally unachievable.

On the 18th, Trump administration officials told the media that if Anthropic wishes to re-release its flagship model Claude Fable 5, the company must effectively address the security vulnerabilities identified by the government, rather than continuing to argue whether the associated risks are exaggerated. This position marks a rapid escalation towards a showdown between the two sides. Last week, Fable 5 was forced offline by export control measures due to jailbreak concerns—jailbreaking refers to attacks that use specific prompts to bypass the model's safety guardrails.

During a technical meeting with the Department of Commerce and the National Cyber Director’s office, Sean Cairncross, on Monday, Anthropic reiterated that the government’s concerns are overblown and that the real impact of jailbreak attacks is limited. However, the National Security Agency (NSA) has concluded that Fable 5’s safety guardrails can be bypassed; these guardrails were originally intended to prevent users from accessing the underlying model Mythos's sensitive capabilities in cybersecurity, chemistry, and biology. According to media reports citing three inside sources, the government has now essentially placed the entire responsibility for resolving the issue on Anthropic, rather than attempting joint intervention.

This regulatory tug-of-war highlights a deeper dilemma in AI governance: whether the government has the capability and willingness to take responsibility for the safety of frontier models, and whether the regulatory goal of "no jailbreak" is technically feasible—all directly impacting Anthropic’s and the broader AI industry’s commercial prospects.

Government Draws the Line: Proactive Testing, Proactive Reporting

According to media citing informed sources, both the Department of Commerce’s AI Standards and Innovation Center and the NSA stated that they lack sufficient personnel and resources to track every potential jailbreak path for every model on the market. Based on this reality, the government’s stance has shifted from "jointly defining the severity of risks with Anthropic" to "requiring Anthropic to bear full compliance responsibility."

Officials made it clear that Anthropic must not only resolve the existing issues with Fable 5, but also conduct continuous proactive safety testing on all its frontier AI models, identify potential jailbreak vulnerabilities itself, and proactively report them to the government. This essentially means the government is requiring Anthropic to establish a compliance mechanism centered on corporate self-regulation, rather than relying on external regulatory agency review.

The White House spokesperson declined to comment on the matter.

Technical Debate: Are Safety Guardrails Solvable?

A more fundamental technical question is surfacing amid this regulatory contest: Is it possible to completely prevent jailbreaking?

The mainstream view among independent cybersecurity experts increasingly leans toward "no." Experts believe that the safety guardrails of AI models are essentially only temporary defenses; skilled users and even future AI models will eventually find ways around these restrictions. This means the goals demanded by the White House face fundamental technical obstacles.

Last week, Anthropic expressed a similar position to the government, insisting that the impact of jailbreaking is "negligible," but this argument clearly failed to persuade officials—the NSA’s technical evaluation became the key basis for the government’s position, making it difficult to reconcile factual differences between the two parties.

For Anthropic, the Fable 5 takedown means not just a commercial loss, but also signals that every future frontier model may face similar regulatory hurdles before launch. If "zero jailbreak" becomes an unwritten threshold for market entry, the pace of AI industry research and commercialization will face substantial pressure.

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