Anthropic Halts Access to AI Models Amid National Security Concerns

WHO:

Techmeme - Howard Lutnick informed Anthropic that Mythos 5 and Fable 5 would be subject to export controls after a company claimed it was able to jailbreak Mythos.

TechCrunch - Amazon CEO Andy Jassy may have been the source of security concerns that led Anthropic to cut off worldwide access to two models.

TechRadar - Anthropic is the organization involved in the decision to halt access to its AI models.

Techmeme - Howard Lutnick is mentioned as a source who communicated with Anthropic regarding the export controls.

WHAT:

Techmeme - Anthropic stated it received the government directive at 5:21 pm Eastern Time on a Friday.

Fortune - Anthropic expressed that the government’s letter “did not provide specific details” of the national security concern.

Fortune - Anthropic claimed that the government made the decision after learning of a technique to bypass Fable 5’s safeguards, which were designed to prevent users from accessing the powerful cybersecurity abilities of Mythos.

Fortune - Anthropic stated, “We disagree that the finding of a narrow potential jailbreak should be cause for recalling a commercial model deployed to hundreds of millions of people.”

Fortune - Anthropic argued that the same jailbreak could be used to elicit similar capabilities from other publicly available models, including OpenAI’s GPT-5.5, which are not subject to similar national security export controls.

Fortune - Anthropic stated, “If this standard was applied across the industry, we believe it would essentially halt all new model deployments for all frontier model providers.”

Fortune - Anthropic is challenging the Pentagon's designation as a “supply chain risk” in federal court.

Fortune - Anthropic confidentially filed for a public listing earlier this month.

Techmeme - Anthropic stated it is working to restore access to its AI models, indicating ongoing efforts to address the U.S. government's export control order.

Techmeme - Anthropic's Fable 5 model was pulled just days after its public release due to the imposition of export controls by the Trump administration.

Techmeme - Anthropic's recent funding round valued the company at $965 billion, which could impact investor enthusiasm for a public listing.

Fortune - Anthropic stated that the government’s directive includes not just foreign nationals located outside the U.S., but also any foreign national in the U.S., including Anthropic’s own non-citizen employees.

Fortune - Anthropic received the directive at 5:21 pm Eastern Time.

Fortune - Anthropic clarified that access to its less powerful Claude models, including its latest Claude Opus 4.8 model, was not affected.

Cointelegraph - Zcash founder Zooko Wilcox stated that Anthropic's Mythos AI model found no further "serious bugs" in the privacy protocol following the patching of a previously discovered forgery bug.

Techmeme - Anthropic stated it believes the U.S. government's export control order for Mythos 5 and Fable 5 is a "misunderstanding" and is working to restore access.

Fortune - Anthropic clarified that the government’s letter “did not provide specific details” of the national security concern.

Fortune - Anthropic argued that the jailbreak the government cited was a narrow one that would unlock Mythos’s cybersecurity capabilities in only one specific instance.

Fortune - Anthropic stated, “We disagree that the finding of a narrow potential jailbreak should be cause for recalling a commercial model deployed to hundreds of millions of people.”

Fortune - Anthropic expressed that if the standard of recalling a commercial model based on a narrow potential jailbreak was applied across the industry, it would essentially halt all new model deployments for all frontier model providers.

Fortune - Anthropic is challenging the Pentagon's designation as a “supply chain risk” in federal court.

Fortune - A recent funding round valued Anthropic at $965 billion.

Fortune - The directive from the U.S. government includes not just foreign nationals located outside the U.S., but also any foreign national in the U.S., including Anthropic’s own non-citizen employees.

Fortune - Anthropic stated, “We apologize for this disruption to our customers,” in a post on X.

Fortune - Anthropic claimed that the government’s letter “did not provide specific details” of the national security concern.

Fortune - Anthropic stated, “If this standard was applied across the industry, we believe it would essentially halt all new model deployments for all frontier model providers.”

Fortune - Anthropic was forced to disable all access to its newest AI models, Fable 5 and Mythos 5, late on Friday after the U.S. Commerce Department used national security export controls to bar the company from distributing the models to any foreign national.

Fortune - Anthropic clarified that access to its less powerful Claude models, including its latest Claude Opus 4.8 model, was not affected.

Fortune - Anthropic received the directive at 5:21 pm Eastern Time.

Fortune - Anthropic stated that the government made the decision after learning of a technique to bypass Fable 5’s safeguards, which were designed to prevent users from accessing the powerful cybersecurity abilities of Mythos.

Fortune - Anthropic argued that the jailbreak the government cited was a narrow one that would unlock Mythos’s cybersecurity capabilities in only one specific instance.

Fortune - Anthropic stated that if the standard of recalling a commercial model based on a narrow potential jailbreak was applied across the industry, it would essentially halt all new model deployments for all frontier model providers.

Fortune - Anthropic confidentially filed for a public listing earlier this month, and a recent funding round valued the company at $965 billion.

Techmeme - Anthropic stated it is working to restore access to its AI models, indicating ongoing efforts to address the U.S. government's export control order.

TechRadar - Anthropic is shutting off access to its Mythos 5 and Fable 5 models.

Techmeme - Anthropic has been ordered by the U.S. government to suspend access for all foreign nationals to its AI models.

Techmeme - The Trump administration is blocking foreign governments, companies, and individuals from accessing Anthropic's most advanced AI models.

WHERE:

TechRadar - The directive comes from the U.S. government, indicating a national scope.

WHY:

Techmeme - The White House imposed export controls on Anthropic's Mythos AI model partly over suspicions that a China-linked group had accessed it.

Techmeme - The Trump administration's decision to impose export controls followed multiple tense calls between Dario Amodei and administration officials.

Techmeme - The White House imposed export controls on Anthropic's powerful Mythos AI model partly over suspicions that a China-linked group had accessed it.

Fortune - U.S. President Trump ordered all federal agencies to stop using Anthropic’s models after the company refused to agree to the Pentagon’s preferred contract terms for AI vendors.

TechCrunch - The concerns raised by Amazon CEO Andy Jassy reportedly contributed to the U.S. government's decision to impose export controls on Anthropic's models.

Fortune - The Pentagon declared Anthropic a “supply chain risk” in early March, requiring the U.S. military to cease using its models and prohibiting defense contractors from using them for government contracts.

Fortune - U.S. President Trump in February ordered all federal agencies to stop using Anthropic’s models after the company refused to agree to the Pentagon’s preferred contract terms for AI vendors.

Fortune - U.S. President Donald Trump in February ordered all federal agencies to stop using Anthropic’s models after the company refused to agree to the Pentagon’s preferred contract terms for AI vendors.

TechRadar - The decision to halt access is due to national security concerns following a 'potential jailbreak' of the AI models.

Techmeme - Anthropic believes the U.S. government's export control order is a "misunderstanding."

HOW:

Fortune - Anthropic is challenging the Pentagon's designation as a “supply chain risk” in federal court.

Techmeme - The export controls were implemented after a company claimed it was able to jailbreak the Mythos model.

(UPDATED June 14, 2026 08:16 UTC)

Anthropic has announced that it received a government directive regarding national security concerns, which they claim lacked specific details. The company argues that the government's decision was based on a technique to bypass safeguards in their model, Fable 5, and they believe this standard could halt new model deployments across the industry. Additionally, Anthropic is challenging the Pentagon's designation of a "supply chain risk" in federal court while also having confidentially filed for a public listing earlier this month.

(UPDATED June 14, 2026 04:17 UTC)

Anthropic is actively working to restore access to its AI models after the U.S. government imposed export controls, which led to the withdrawal of its Fable 5 model just days after its release. This decision by the Trump administration was influenced by concerns that a China-linked group may have accessed Anthropic's Mythos AI model, following several tense discussions between Dario Amodei and officials. Despite these challenges, Anthropic's recent funding round has valued the company at an impressive $965 billion, potentially affecting investor interest in a future public listing.

(UPDATED June 13, 2026 23:15 UTC)

The White House has imposed export controls on Anthropic's powerful Mythos AI model, citing concerns that a group linked to China may have gained access to it. This decision reflects ongoing tensions surrounding technology and national security. The move highlights the increasing scrutiny of AI developments in relation to international relations.

(UPDATED June 13, 2026 21:17 UTC)

President Trump has ordered all federal agencies to cease using Anthropic’s models after the company declined to accept the Pentagon's preferred contract terms for AI vendors. In response, Anthropic received a directive stating that export controls would apply to its Mythos 5 and Fable 5 models, affecting not only foreign nationals outside the U.S. but also non-citizen employees within the country. The company is currently challenging the Pentagon's classification of it as a “supply chain risk” in federal court, while clarifying that access to its less powerful Claude models remains unaffected.

(UPDATED June 13, 2026 20:31 UTC)

Amazon CEO Andy Jassy may have sparked security concerns that led Anthropic to restrict global access to two of its models. Meanwhile, Zcash founder Zooko Wilcox announced that Anthropic's Mythos AI model identified no additional serious bugs in the privacy protocol after addressing a previously discovered forgery issue. These developments reportedly influenced the U.S. government's decision to implement export controls on Anthropic's models.

(UPDATED June 13, 2026 17:19 UTC)

Anthropic is pushing back against the U.S. government's export control order for its AI models, Mythos 5 and Fable 5, claiming it is a "misunderstanding" and is actively seeking to restore access. The company argues that the Pentagon's concerns about a narrow potential jailbreak do not warrant recalling a model that is already in use by hundreds of millions of people, and they are challenging the Pentagon's designation of being a "supply chain risk" in federal court. This situation arose after President Trump ordered federal agencies to stop using Anthropic’s models due to the company's refusal to accept the Pentagon's contract terms for AI vendors.

(UPDATED June 13, 2026 15:27 UTC)

The U.S. government has issued a directive affecting not only foreign nationals outside the country but also those within the U.S., including non-citizen employees of Anthropic. In response to this disruption, Anthropic expressed their apologies to customers and stated that the government's letter lacked specific details regarding the national security concern. The company is now challenging the Pentagon's designation of being a "supply chain risk" in federal court, arguing that if such standards were applied across the industry, it could halt all new model deployments for frontier model providers.

(UPDATED June 13, 2026 13:21 UTC)

Anthropic has been compelled to disable access to its latest AI models, Fable 5 and Mythos 5, following a directive from the U.S. Commerce Department that restricts distribution to foreign nationals due to national security concerns. However, the company clarified that its less powerful Claude models, including the new Claude Opus 4.8, remain unaffected by this decision. Anthropic argued that the government's action was based on a narrow jailbreak that would only unlock Mythos's cybersecurity capabilities in a specific instance, warning that applying such a standard across the industry could halt new model deployments altogether.

(UPDATED June 13, 2026 11:33 UTC)

Anthropic has announced that it is actively working to restore access to its AI models, responding to the U.S. government's export control order. The company is making ongoing efforts to address the situation. This development highlights the challenges tech companies face in navigating regulatory environments while advancing their technologies.

(UPDATED June 13, 2026 09:53 UTC)

Anthropic has announced it will halt access to its advanced AI models, Mythos 5 and Fable 5, following a directive from the U.S. government aimed at blocking foreign nationals from accessing these technologies. This decision comes in response to national security concerns after a company claimed it successfully jailbroke the Mythos model, which Anthropic believes is a misunderstanding of the situation. Howard Lutnick has been cited as a source who communicated with Anthropic regarding these export controls, highlighting the national scope of this development.