Skip to content
News Regulation

Washington Post: Trump officials planned Anthropic export controls for weeks after China-linked firm sought Mythos access

· by Pondero Newsdesk

The short version

A four-byline Washington Post investigation published June 15, 2026 found that Trump administration officials began weighing sanctions on Anthropic weeks before the June 12 shutdown, triggered by a suspected China-linked firm's request to access the Mythos model.

Washington Post: Trump officials planned Anthropic export controls for weeks after China-linked firm sought Mythos access

A Washington Post investigation published late on June 15, 2026 found that Trump administration officials began weighing sanctions on Anthropic weeks before they ordered Fable 5 and Mythos 5 offline on June 12. The reporting establishes that the shutdown was not a snap reaction to a discovered vulnerability, but a planned escalation rooted in a much earlier access dispute.

What the investigation found

The primary piece, bylined by Cat Zakrzewski, Isaac Arnsdorf, Ian Duncan, and Gerrit De Vynck, reports that the triggering event was an access request to the Mythos model from a firm the White House suspected had Chinese ties. That request shattered what administration officials described to reporters as already-fragile trust in Anthropic. Two White House officials who spoke on condition of anonymity told the Post that internal deliberations about sanctions began well before the June 12 Commerce Department directive was issued.

A companion piece by Ian Duncan, Gerrit De Vynck, Ellen Nakashima, and Cat Zakrzewski focused on the mechanics of the shutdown itself. Three days after Fable was released publicly, the Trump administration called Anthropic with a demand to take it offline. Officials provided little explanation for the order, per the Post's companion investigation, and gave the company 90 minutes to comply.

Why it matters

Previous reporting from Axios, Fortune, and Politico established the timeline of the June 12 shutdown itself. The Post investigation adds a new layer: the deliberation that preceded it, and the specific incident that set it off. The China-linked access request reframes the shutdown as the endpoint of a weeks-long deterioration in the government's relationship with Anthropic, not an emergency response to a newly discovered jailbreak.

That distinction has direct implications for Anthropic's pending legal challenge to its Pentagon "supply chain risk" designation, issued in early March. A premeditated sanctions process fits a different legal frame than an ad hoc security response. It also bears on investor sentiment: Anthropic filed confidentially for a public listing earlier in June, and evidence that export controls were being planned against it during the weeks surrounding that filing is a material disclosure question.

The 90-minute compliance window also matters on its own terms. It left no time for Anthropic to negotiate a narrower restriction that might have kept the model accessible to US citizens. The result was a blanket shutdown affecting all users worldwide, including non-citizen employees inside the United States.

Context

The Post's findings extend a pattern of escalating friction between Anthropic and the Trump administration. The White House designated Anthropic a supply chain risk for Pentagon contractors in early March after the company declined contract terms permitting autonomous weapons use and mass domestic surveillance. Anthropic is contesting that designation in federal court.

White House AI adviser David Sacks separately described the shutdown over the weekend as the result of Anthropic CEO Dario Amodei refusing to fix a jailbreak. Anthropic has not confirmed that framing. Prior reporting by Semafor cited government suspicion that a Chinese-linked group had already used the jailbreak Amazon identified, though Anthropic told Semafor that Chinese access to its products is prohibited and the White House had not raised that concern in its conversations with the company.

Whether the suspected China-linked firm that requested Mythos access is the same group the government later suspected of using the jailbreak remained unclear from the Post reporting at publication.

What to watch next

Two threads carry the most consequence. First, whether the identity of the firm that requested Mythos access becomes public, either through the ongoing Anthropic litigation or through congressional inquiry. Second, whether the Senate or House commerce committees use the premeditation timeline revealed by the Post to call Commerce Department witnesses and examine the legal basis for the export control process.

The Post investigation is the most detailed account yet of how the government arrived at the June 12 decision. It will likely be cited in Anthropic's court filings and in any congressional hearing that follows.

Sources