US Export Controls Force Anthropic to Block Foreign Access to Mythos, Fable 5
US government ordered Anthropic to disable foreign access to AI models Mythos and Fable 5 after jailbreak vulnerabilities, prompting the company to close access and meet with the Trump administration to resolve the dispute. Dozens of cybersecurity experts have petitioned the government to lift the export control order.
1. US Imposes Export Controls on AI Models
The US government ordered Anthropic to block all foreign nationals from accessing its most advanced AI models, Mythos and Fable 5, after discovering jailbreak vulnerabilities that circumvented safety safeguards. The directive requires immediate suspension of non-US user access under national security regulations.
2. Anthropic Disables Access and Engages Administration
Anthropic responded by disabling access to the affected models for all users and scheduled meetings with the Trump administration to seek exemptions or modifications to the export restrictions. Senior executives aim to negotiate a path that balances compliance with preserving model availability.
3. Cybersecurity Experts Protest Export Ban
Over 50 cybersecurity veterans published an open letter calling for the government to lift the controls on Mythos and Fable 5, arguing that the ban undermines critical security research and international collaboration. They assert that robust usage protocols can mitigate misuse without broad export prohibitions.
