The Trump administration has broken its public silence on why it took the extraordinary step of imposing export controls on Anthropic’s Fable 5 and Mythos 5 AI models — and the framing puts the responsibility squarely on Anthropic’s CEO.

David Sacks, the administration’s AI and crypto czar and Co-Chair of the President’s Council of Advisers on Science and Technology, posted a detailed explanation on X defending the Commerce Department’s directive. His central claim: the government acted “reluctantly” only after Anthropic CEO Dario Amodei dismissed a known jailbreak as “not serious” and refused to either fix it or pull the model from deployment.

The Administration’s Account

According to Sacks, the sequence of events unfolded something like this:

A “highly credible trusted partner” — reportedly connected to entities including Amazon researchers and Luta Security — identified a jailbreak in Fable 5, the consumer-facing version of Anthropic’s powerful Mythos 5 model. Mythos 5 had already drawn attention for its advanced cybersecurity capabilities, including sophisticated vulnerability analysis. The jailbreak reportedly bypassed Fable 5’s guardrails and could unlock those unrestricted cybersecurity capabilities.

The administration presented this finding to Amodei. Per Sacks, Amodei characterized the jailbreak as not serious enough to justify action and declined to either patch it or take Fable 5 offline. Sacks called this “bewildering,” particularly given that Anthropic has publicly positioned itself as a safety-first company and Amodei himself had previously warned publicly about the risks of Mythos-class models.

The Commerce Department then issued its export control directive, requiring licenses for any export, re-export, or transfer of Fable 5 and Mythos 5 to foreign nationals — including foreign nationals inside the United States. Because Anthropic couldn’t practically implement nationality-based API restrictions, the company disabled both models entirely for all customers.

Sacks’ Key Points

The administration’s framing in Sacks’ post is worth unpacking:

This is targeted, not systemic: Sacks was emphatic that the controls apply specifically to Fable 5 and Mythos 5 due to a specific security issue, not to the AI industry broadly or to Anthropic’s other models (Claude models were unaffected). He explicitly rejected claims that this was connected to prior disputes around Pentagon supply-chain risk designations.

The goal is remediation, not punishment: Sacks framed the controls as temporary. Fix the jailbreak, address the government’s security concerns, and the controls would be lifted. The administration is not trying to shut down Anthropic.

The “recklessness” framing is deliberate: Calling Anthropic’s response reckless is a precise rhetorical choice. Anthropic has long advocated for AI regulation — including what Amodei has called an “FAA for AI” — and has repeatedly cited safety as its core differentiator. Sacks appears to be inverting that positioning: the safety-first company, in the government’s telling, chose not to fix a safety issue when asked.

The Irony Problem

The optics here are genuinely awkward for Anthropic. Dario Amodei had publicly described Mythos-class models as potentially posing “very real risks” to cybersecurity, critical infrastructure, the financial sector, and national security. He had advocated for exactly the kind of strong AI oversight that, in this instance, the government exercised against his company.

Critics on social media were quick to note the irony: the AI regulation Amodei called for appears to have been used, at least in part, as justification for the export control action against his own models.

Anthropic’s public position has been notably different from Sacks’ account. The company described the jailbreak as narrow — not a universal bypass — and argued that similar capabilities exist in other commercially available models without triggering government action. Anthropic also pushed back on the process, describing the directive as opaque and lacking due process or sufficient technical specifics.

What “Recklessness” Means for AI Governance

Beyond the specific dispute, the administration’s language choice signals something important about how it intends to exercise oversight over frontier AI companies going forward.

By framing the issue as a question of Anthropic’s corporate conduct rather than an inherent risk of the technology, Sacks is implying that export controls are available as a lever not just when models are dangerous in the abstract, but when companies fail to respond appropriately to specific identified risks. That’s a significant expansion of the regulatory logic — and one that other AI labs should take seriously.

Additional context from multiple reports suggests the government had concerns about a China-linked group having accessed Mythos 5. If accurate, that context would materially change the risk calculus the administration was working with, regardless of how Anthropic assessed the jailbreak internally.

Where Things Stand

As of publication, the export controls remain in place. Both Fable 5 and Mythos 5 are disabled for all customers. Anthropic is reportedly working toward compliance, and the administration has indicated the controls could be lifted once the specific security issue is resolved.

The situation remains fluid. What’s already clear is that the US government has demonstrated it’s willing to use export control authority directly against frontier AI companies — not just against adversary nations — and that corporate safety assessments don’t automatically override government security determinations.

That precedent will outlast this particular dispute.

Sources

  1. Fox Business — Export Controls on Anthropic Stem from Company’s ‘Recklessness’
  2. Tom’s Hardware — Trump Adviser David Sacks Says Anthropic Refused to Fix Fable 5 Jailbreak
  3. ANI News — US Export Controls on Anthropic Tied to Safety Fix, Says David Sacks
  4. Fortune — Anthropic Disables Fable, Mythos: Export Controls, National Security Threat
  5. Axios — Anthropic, Trump, Mythos, Fable, National Security

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