WASHINGTON, June 13 (Nationwide Times) — Anthropic has disabled access to its Claude Fable 5 and Mythos 5 artificial intelligence models for all users after a U.S. government action aimed at blocking access by foreign users and foreign nationals, according to Anthropic statements and a Commerce Department letter described in national reporting.
The action changes the status of two named Anthropic products from recently available tools to suspended models. The record provided for this article does not include Anthropic model cards, release notes or technical documentation showing the exact capabilities of Fable 5 or Mythos 5. The documented change is narrower and clearer: access was cut off after the government raised national-security concerns.
The dispute is centered in Washington, where the White House, Pentagon, Commerce Department and other federal agencies have taken a series of actions this year against Anthropic products. Those actions moved the issue from a Silicon Valley product question into federal export-control, procurement and national-security policy.
According to Anthropic’s statement, as described by the BBC, the company said June 13 that it would disable its most advanced AI models for all users to comply with the government directive. The models named in accounts of the suspension are Claude Fable 5 and Mythos 5.
The Wall Street Journal reported that Commerce Secretary Howard Lutnick sent Anthropic CEO Dario Amodei a letter on June 13 stating that Fable 5 and Mythos 5 were subject to export limits. The Journal, citing the letter and an administration official, reported that the ruling barred use by clients outside the United States and by foreign nationals inside the United States.
That point is central to the scope of the suspension. If the restriction applies to foreign nationals inside the United States, then the compliance problem is not limited to blocking overseas logins or foreign companies. It also reaches users physically present in the country. Anthropic’s reported response was to disable the models for all clients, not only for users it had identified as covered by the restriction.
The public record available for this article does not establish the precise legal mechanism behind the June order. The Journal described the action as export limits. The BBC described it as a government directive tied to security concerns. The underlying Commerce Department letter, any formal export-control notice and the full text of Anthropic’s June 13 statement were not included in the records reviewed for this article.
Anthropic said U.S. national-security officials did not identify a specific flaw, according to the BBC’s account of the company’s statement. Anthropic said its understanding was that the government believed there was a technique to bypass, or “jailbreak,” Fable 5. The company also said it reviewed a demonstration of the alleged method and found that it exposed only a limited number of previously known, minor vulnerabilities.
No independent technical verification of that alleged jailbreak method was included in the records reviewed. The source material also does not show whether disabling all user access was technically required, legally required or a compliance choice made by Anthropic after the government action.
The June suspension followed an earlier and separate fight between Anthropic and the Trump administration over military and federal use of Claude.
In February, Anthropic said it refused Pentagon demands to remove safety restrictions for two categories of use: mass domestic surveillance and fully autonomous weapons capable of lethal action without human intervention. Anthropic and Amodei said the company wanted to keep serving U.S. national-security customers while retaining those exceptions, according to public statements described by the BBC, The New York Times and other national outlets.
The Pentagon dispute quickly became a government-wide matter. President Donald Trump said federal agencies should stop using Anthropic technology, according to the BBC and The New York Times, which cited Trump’s public post and Anthropic’s response. Defense Secretary Pete Hegseth was publicly linked to the push for unrestricted lawful military use of Anthropic models, according to accounts citing Hegseth’s public posts and Defense Department statements.
Anthropic later said the Defense Department had designated it a “supply chain risk” to national security. The company said that label would bar defense contractors from using Anthropic tools on defense-related work. NBC News reported that a senior Defense Department official confirmed immediate enforcement of the designation. The formal designation memo was not included in the source records reviewed for this article.
Anthropic said it would challenge the supply-chain-risk designation in court. The BBC reported that a judge later ruled the Pentagon order could not be enforced while the lawsuit proceeds. The source material reviewed for this article does not name the court, judge, case caption or docket number, and does not include the ruling itself.
The federal shift away from Anthropic had already begun before the June suspension. Reuters reported in March that the State Department, Treasury Department and Department of Health and Human Services were moving away from Anthropic products. Reuters cited a State Department memo, an email from State Department spokesperson Tommy Pigott and a post by Treasury Secretary Scott Bessent.
The State Department memo reviewed by Reuters said the department’s internal chatbot, StateChat, would use GPT4.1 from OpenAI during the transition. Reuters also reported that HHS communications named Google Gemini as an alternative for staff. Those records show the operational effect inside federal agencies: Anthropic tools were being replaced in at least some internal government systems before the later shutdown of Fable 5 and Mythos 5.
The broader record shows two tracks of federal action. The first was a defense-procurement and military-use dispute over whether Anthropic could keep safety limits on certain uses of Claude. The second was the June Commerce-related action that restricted access to specific advanced models because of national-security concerns tied to foreign access.
The available evidence does not show that those two tracks are legally the same action. It does show that both came from Washington-based federal authorities and both limited the use of Anthropic products by government users, contractors or the public.
The product effect is now clear even where the legal record remains incomplete: Claude Fable 5 and Mythos 5 are no longer available to users under Anthropic’s reported compliance response. The public record reviewed for this article does not prove the alleged jailbreak concern, does not identify a specific technical failure in the models and does not include the government documents needed to determine the full legal basis of the restriction.
