US Bans Access to New Anthropic AI Models for Foreigners
Photo: Tom's Hardware
Quick answer
The US government required Anthropic to block access to AI models Claude Fable 5 and Mythos 5 for foreigners due to potential security threats.
The US government ordered Anthropic to block access to two new AI models—Claude Fable 5 and Claude Mythos 5—for foreign nationals. The directive, issued by the US Department of Commerce, applies not only to users outside the country but also to foreign employees of Anthropic. Unable to implement selective restrictions, the company decided to disable the models entirely for all global clients.
The models were launched just three days before the ban. Mythos 5, with advanced code analysis capabilities, was previously used in Project Glasswing and, according to sources, by the US National Security Agency (NSA) for cyber operations. However, after another company reported potential "jailbreak" vulnerabilities, the government mandated the block.
Anthropic called the ban a "misunderstanding" and noted that similar vulnerabilities exist in other public models, including OpenAI’s GPT-5.5. The company warned that revoking widely deployed models could set a precedent and delay the launch of advanced AI solutions. Meanwhile, the market is pivoting to open models, primarily Chinese, which face no such restrictions.
Common questions
- Why did the US ban access to Anthropic’s new AI models?
- The US government identified national security risks in Claude Fable 5 and Mythos 5, as they could be exploited to detect software vulnerabilities. The ban applies to foreign nationals, including the company’s own employees.
- What are the consequences of the ban for Anthropic?
- Anthropic had to disable the models globally since selectively restricting access for foreigners was technically unfeasible. This may damage the company’s reputation and slow AI industry progress.
- What alternatives exist to the blocked AI models?
- The market is shifting toward open-source models, including Chinese developments like Alibaba’s Qwen and Zhipu’s GLM. These models have no usage restrictions and are widely adopted by startups.
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