Anthropic said on Friday it will \u201cabruptly disable\u201d its most advanced AI models for all users after the U.S. government ordered it to suspend access to the models for foreign nationals, citing national security concerns. <\/p>\n
The company received the export control directive to suspend access to Fable 5 and Mythos 5 for all foreign nationals, without being given specific details of its national security concerns, Anthropic said in a statement. <\/p>\n
It is Anthropic\u2019s understanding that the government believes there is a method of bypassing, or \u201cjailbreaking,\u201d a safeguard that would prevent Fable 5 from being used to identify software vulnerabilities, the company said. <\/p>\n
The order comes just as a previous dispute between Trump administration officials and IPO-bound Anthropic showed signs of easing across parts of the U.S. government. <\/p>\n
Anthropic\u2019s relationship with the government ruptured this year after it refused to allow the U.S. military to use its AI models for domestic surveillance and fully autonomous weapons systems. The government responded by putting Anthropic on a supply chain blacklist, set to take effect later in the year. <\/p>\n
Trump suggests Pentagon open to revisiting Anthropic blacklist in media interview<\/a><\/p>\n The action also marks a major escalation of U.S. efforts to halt foreign adversaries\u2019 AI capabilities. For years, U.S. export controls have focused on the chips and tools that power AI rather than on restricting foreign access to AI itself. <\/p>\n Anthropic said the government has given it only \u201cverbal evidence of a potential narrow, non-universal jailbreak.\u201d<\/p>\n \u201cWe disagree that the finding of a narrow potential jailbreak should be cause for recalling a commercial model deployed to hundreds of millions of people,\u201d the company said.<\/p>\n The government directive and Anthropic\u2019s response highlight growing tension between AI developers and regulators over how to assess risks from so-called \u201cjailbreaks,\u201d or methods used to bypass model safeguards. <\/p>\n As recently as Wednesday, Anthropic had called for greater U.S. oversight of AI, including the ability to block models with unacceptable risks. It said, however, that the government action on Friday did not follow principles of fair and fact-based regulation. <\/p>\n The Pentagon\u2019s chief information officer, Kirsten Davies, said in a post on X that the Defence Department supported prioritizing national security. <\/p>\n \u201cSome things are simply more important than revenue cycles, clickbait, and pre-IPO valuation. America First. Always,\u201d Davies said. <\/p>\n Anthropic confidentially filed for a U.S. IPO last month, edging ahead of rival OpenAI in the race to reach public markets.<\/p>\n Sophisticated cyberaccess<\/p>\n Earlier this week, Anthropic rolled out an AI model named Claude Fable 5<\/a>, representing a new tier of capability it calls \u201cMythos-class.\u201d The model is accompanied by guardrails barring its use in risky areas such as cybersecurity, which some users have complained are \u201coverly broad,\u201d Anthropic said.<\/p>\n