Anthropic Blocks Access to Fable 5 and Mythos 5 Models for Foreign Nations

The Verge AI · Jun 15, 2026 · 1 min read · Read original article →

The US government has ordered Anthropic to block access to its Fable 5 and Mythos 5 models for foreign nations due to national security concerns. The company has complied with the order, citing minor vulnerabilities that can be found in other models. Anthropic has also taken steps to safeguard its models, including working with governments and changing its data retention policy.

💡 Key Takeaways

Anthropic has blocked access to Fable 5 and Mythos 5 models for foreign nations due to national security concerns.
The company claims the vulnerabilities discovered were minor and available via other models.
Anthropic has taken steps to safeguard its models, including working with governments and changing its data retention policy.