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NSA Loses Anthropic Mythos Access After Export Ban

6/24/2026

Summary

Story summary

The NSA lost access to Anthropic’s Mythos AI model after June 2026 export controls.
In Project Glasswing, Mythos flagged vulnerabilities in sensitive U.S. government systems.
Senator Mark Warner said the model breached all classified systems within hours, though officials said it did not necessarily exploit the flaws.
The export ban halted Mythos 5 and Fable 5 releases, placed Anthropic on a U.S. security blacklist, and sparked a debate on frontier AI in cybersecurity.

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Story summary

The NSA lost access to Anthropic’s Mythos AI model after June 2026 export controls.
In Project Glasswing, Mythos flagged vulnerabilities in sensitive U.S. government systems.
Senator Mark Warner said the model breached all classified systems within hours, though officials said it did not necessarily exploit the flaws.
The export ban halted Mythos 5 and Fable 5 releases, placed Anthropic on a U.S. security blacklist, and sparked a debate on frontier AI in cybersecurity.