US Lifts Export Controls on Anthropic's Fable 5 and Mythos 5 AI Models

Fable and Mythos are coming back online. Leading US AI company Anthropic says the US Commerce Department has lifted export controls on the AI models, less than three weeks after the company was ordered to suspend access to them over national security risks. Washington has stepped up oversight of new ​model releases to identify potential ‌threats amid concerns that advanced AI models could be misused by military intelligence in China, Russia or other countries of ⁠concern.

Washington had restricted Claude Fable 5 and Mythos 5 invoking national security concerns. OpenAI was also asked to limit the rollout of its latest GPT-5.6 model to vetted partners only.

US lifts curbs on Anthropic's Fable, Mythos AI models  Nikkei Asia

US government has lifted export controls on Anthropic's advanced AI models, Claude Fable 5 and Mythos 5, following national security concerns. The decision, made after weeks of tension and negotiations, allows trusted partners and federal agencies to access the models with new safeguards. Anthropic is restoring access globally, thanking users for their patience and highlighting collaborative efforts to refine AI safety.

Anthropic said on Tuesday that the US Commerce Department lifted export controls on its Fable and Mythos AI models, less than three weeks after the company was ordered to suspend access to its most advanced AI models over national security risks. Washington has stepped up oversight of new model releases to identify potential threats amid concerns that advanced AI models could be misused by military intelligence in China, Russia or other countries of concern. Anthropic disabled its Mythos 5 and Fable 5 models following a June 12 export-control order. Last week, the US government allowed the company to release Mythos 5 but only to some “trusted” US organisations. “We’ve received notice that the Department of Commerce has lifted export controls on Claude Fable 5 and Mythos 5. We’ll begin restoring access tomorrow,” Anthropic said in an X post. A letter to Anthropic from US Commerce Secretary Howard Lutnick that was seen by Reuters also said the export controls were withdrawn. Anthropic had “agreed to proactively detect and address security risks associated with the models,” Lutnick said. It had also agreed to work diligently with the US government on protocols for Mythos, Fable and future models and to inform the US government of any malicious activity, he added. US government might re-evaluate if circumstances change Lutnick, however, said that the department “reserves the right to re-evaluate the decisions made in this letter and the necessity of re-imposing a license requirement, should circumstances change or should Anthropic fail to adhere to its commitments”. Both Fable and Mythos use the same underlying AI model, but Fable is designed to be widely available for public use whereas some safeguards are lifted for Mythos. Anthropic has implemented a new safeguard that targets and blocks a technique that it believes the government viewed as a method of bypassing or “jailbreaking” Fable 5, a company source said, declining to be identified. The source, however, added that the vulnerabilities found by the technique which had concerned the government had been known and patched earlier. Experts have said that Mythos models, in the wrong hands, could dramatically accelerate sophisticated cyberattacks, particularly in sectors such as banking that rely on complex, interconnected, and often decades-old technology systems. The government’s decision on Friday to allow access to Mythos to some “trusted” US organisations came in tandem with an announcement by rival OpenAI that it had delayed a full public launch of GPT-5.6 at the US government’s request, limiting its access to a small group of vetted partners. Those government actions had drawn much criticism that the administration’s choice of which companies were worthy of being considered “trusted” was unfair and not transparent. Increased scrutiny of AI models this month began with US President Donald Trump’s signing of an executive order establishing a voluntary framework for AI developers to offer “covered frontier models” to the US government for up to 30 days before releasing them to trusted partners. Isaac Harris, executive director of the Frontier Security Institute, a nonprofit focused on AI and national security, said that Tuesday’s lifting of curbs indicated that “there’s now a process for standards for US models.” But he added: “There’s still a question mark as to how equivalently dangerous capabilities coming from China with less guardrails will be handled by the administration in the US market.” Both OpenAI and Anthropic have confidentially filed for US initial public offerings. Anthropic’s relationship with the US government has been particularly rocky this year. The Pentagon designated the company a “supply-chain risk”, preventing contractors from using Anthropic’s AI when working for the US military, after the company refused to allow its models to be used for mass domestic surveillance or fully autonomous weapons systems.

Anthropic will restore global access to its Fable 5 and Mythos 5 models after the US Department of Commerce lifted security restrictions that blocked the powerful systems earlier this month.

Anthropic said on Tuesday it would restore global access to its most advanced AI models after the US government lifted export restrictions imposed earlier this month over national security concerns. The decision marks a reversal after the company worked with Washington to strengthen safeguards around the technology.

AI firm says it will begin restoring access to Claude Fable 5 and Mythos 5 after removal of export controls.

The AI company was forced earlier this month to suspend access to its Fable 5 and Mythos 5 models for all foreign nationals Anthropic has restored customer access to its powerful newest AI model, Fable, after a more than two-week blackout resulting from US government safety concerns that it could be abused to enable serious cyber-attacks. The San Francisco company said export controls have been lifted, citing a social media post from the US commerce secretary, Howard Lutnick, in which he said: “Over the past two weeks, we have worked closely with Anthropic to analyze and approve Fable 5 to ensure alignment across the US Government and strengthen America’s leadership in AI.” Continue reading...

We've received notice that the Department of Commerce has lifted export controls on Claude Fable 5 and Mythos 5, says Anthropic in a post on X.

Fable and Mythos were abruptly suspended in June over concerns that they could be used by hackers.