--- title: "Anthropic shuts down Mythos access after the ban issued in the United States" type: "News" locale: "en" url: "https://longbridge.com/en/news/289669471.md" description: "The Trump administration, citing national security, has demanded that Anthropic prohibit all foreign citizens from accessing its advanced AI models. Anthropic subsequently closed access to the Mythos and Fable 5 models to ensure compliance. This move marks the first comprehensive restriction by the U.S. on foreign access to cutting-edge AI software, raising concerns in the industry about constitutional issues, business impacts, and innovation stagnation, and it may set a precedent for other AI developers" datetime: "2026-06-13T15:13:57.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/289669471.md) - [en](https://longbridge.com/en/news/289669471.md) - [zh-HK](https://longbridge.com/zh-HK/news/289669471.md) --- # Anthropic shuts down Mythos access after the ban issued in the United States After the Trump administration issued an unprecedented order prohibiting all foreign citizens from accessing its technology, Anthropic has shut down access to its advanced artificial intelligence models, including Mythos. The company stated in a release that the U.S. government required it to suspend all foreign citizens' access to the Fable 5 and Mythos 5 models, "regardless of whether they are in the United States or abroad," citing national security. A U.S. official confirmed that the Department of Commerce had issued the letter. Subsequently, the model developer cut off all customer access to the two systems to ensure compliance. The U.S. government has never before taken such comprehensive measures to restrict foreign access to cutting-edge AI models developed by American companies. Both the Trump and Biden administrations have restricted the export of other critical technologies such as semiconductors and supercomputers, and there has been discussion about whether access to AI models should be blocked. However, restrictions targeting the software itself have raised multiple concerns at both constitutional and business levels. Anthropic stated that the government issued the order because it found a potential "jailbreak" (i.e., bypassing security barriers) risk in its recently released Mythos derivative version, Fable 5. The company had previously prohibited Fable 5 from performing cybersecurity tasks. "We believe that recalling a commercially available model aimed at hundreds of millions of users solely due to the discovery of a limited potential jailbreak risk is inappropriate," Anthropic stated in a post on its official website. "If the entire industry were to adopt this standard, the deployment of new models by all cutting-edge model providers would essentially come to a standstill." The government's broad restrictions on a range of AI models in the name of national security could set a precedent for all mainstream AI model developers, including OpenAI, Alphabet (Google's parent company), and Meta. Industry leaders such as Jensen Huang, CEO of NVIDIA, and Sam Altman, CEO of OpenAI, have previously urged the U.S. government to promote the global adoption of American AI systems to maintain the country's leading edge. Anthropic stated that it received the government order at 5:21 PM New York time on Friday. This directive, issued before the close of business on Friday, contradicts previous statements from the Trump administration and a recent executive order that indicated the government would not implement a licensing system for model reviews. The directive on Friday may also exacerbate the long-standing tensions between Anthropic and certain factions within the Trump administration. Earlier this year, the AI developer clashed with the Pentagon over the use of its technology for military and surveillance purposes. Following the conflict, the government listed the company as a risk to the U.S. supply chain and ordered federal agencies to gradually phase out its products. The privately held company Anthropic has long positioned itself as a "more responsible AI developer," having first released the Mythos model to a select few companies and institutions in April of this year, warning that it has the capability to detect cybersecurity vulnerabilities, making widespread distribution too risky There are signs that this limited release could ease the tensions between Anthropic and the Trump administration: Bloomberg previously reported that the U.S. government was prepared to have federal core agencies use a version of Mythos. Mythos also pushed the Trump administration to accelerate the formulation of AI policies, with a recent executive order proposing the implementation of a voluntary model review system, explicitly stating that the executive order does not constitute a mandatory licensing system. U.S. AI developers are competing to launch cutting-edge models to prove to investors that the technology can be profitable, while the government's latest restrictions contradict this trend. Following SpaceX's historic IPO, both OpenAI and Anthropic plan to go public as early as this year. To seize the initiative in releasing cutting-edge AI models, Anthropic published a lengthy blog earlier this month, calling for the establishment of a mechanism for the government and AI developers to jointly decide when to slow down technological development to avoid potential risks. "The world would be better off having a choice, whether to showcase or temporarily pause" the development of dangerous AI, the company stated in the blog. AI technology is rapidly advancing, with its efficiency capable of enhancing human productivity thousands of times, even replacing human jobs, thereby giving rise to a series of new risks. The European Commission stated that it is assessing Anthropic's statement and is in ongoing communication with allies regarding the potential risks and cybersecurity issues related to advanced AI models. 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