Anthropic senior executives are scheduled to meet Trump administration officials in Washington today in an effort to resolve a regulatory dispute over the company’s latest AI models. The meeting follows an export-control directive issued by the U.S. government last Friday, which ordered Anthropic to immediately suspend its Fable 5 and Mythos 5 models and block access by “any foreign national, whether inside or outside the United States.” The stated reason for the order involved “national security-related threats.”
Anthropic has since shut down access to the affected models globally in order to comply with the instruction. People familiar with the matter said the U.S. government had not disclosed specific risks in advance. Instead, officials notified the company by phone on Friday afternoon and later sent a formal restriction letter. The action came only days after the models were released.
Fable 5 and Mythos 5 are described as evolved versions based on Claude Mythos Preview. They were positioned as frontier models with advanced code-vulnerability identification capabilities. Before release, the models had undergone safety testing with government agencies. Some functions had already been limited to enterprise customers and specific users before the latest government order.
The dispute also comes amid continued tension between Anthropic and the U.S. government. Earlier this year, the U.S. Department of Defense classified Anthropic as a “supply chain risk,” which led some defense contractors to be barred from using the company’s technology. Related litigation is still ongoing.
Anthropic said the current dispute may stem from a “potential but non-general jailbreak risk.” The company also emphasized that if this standard is applied to reviews, it could have a systemic effect on the release pace of the entire frontier-model industry. The two sides are still negotiating the possibility of restoring access to the models. The report cited CNBC.