Sources say NSA is using Mythos Preview, and a source says it is also being used widely within the DoD, despite Anthropic's designation as a supply chain risk
- The department moved in February to cut off Anthropic and force its vendors to follow suit.
Context & Ripple Effects
The related coverage shows a widening mismatch between the DoD’s February cutoff directive and reported use of Anthropic’s model inside parts of the national-security apparatus. Subsequent reports place the NSA’s work in cyber-vulnerability testing and red-teaming, while CISA reportedly lacked the same access.
That makes this less a simple procurement dispute than an access-governance problem: different agencies and missions appear to be operating under different practical rules for the same supplier.
First-order effects
- The reported NSA and broader DoD use preserves Anthropic model access for some defense users despite the supply-chain-risk designation and the stated vendor cutoff.
- DoD procurement and security officials face an immediate reconciliation problem between the formal restriction and deployments reportedly already in use.
Second-order effects
- Vendors and integrators serving DoD may need to distinguish between prohibited commercial relationships and authorized agency-level use, increasing compliance and contracting complexity.
- Agencies seeking comparable cyber capabilities may press for clearer exceptions, shared access rules, or alternative model suppliers rather than treating the designation as a uniform operational ban.
Third-order effects
- If this split persists, federal AI procurement will become more mission-specific: a supplier can be restricted in the supply chain while still being treated as strategically useful for selected intelligence or cyber work.
- The episode points toward frontier-model access being governed through agency-specific security and operational controls, not solely through supplier-wide procurement decisions.
The trend: This is one data point in the shift from conventional government software procurement toward tightly governed, mission-dependent access to frontier AI models.