The Trump administration has told Anthropic it disagrees with a controlled rollout that would bring its dangerous cyberattack-capable AI to roughly 120 organisations in total, even as the White House simultaneously explores an executive order to bring Anthropic back into federal government use.

The White House has told Anthropic it opposes the company's plan to expand access to Mythos, its advanced cybersecurity AI model, to roughly 70 additional companies, according to Bloomberg, which cited an administration official speaking anonymously.

The development was first reported by the Wall Street Journal. Anthropic declined to comment.

Mythos, announced in early April through Anthropic's Project Glasswing initiative, is a model capable of autonomously finding and exploiting vulnerabilities across a wide range of critical software, a capability Anthropic deemed too dangerous for general release.

The company has instead been allowing a limited set of organisations to test it on their own systems. Its plan to expand that initial group from approximately 50 to 120 organisations has drawn a direct objection from the Trump administration on two grounds.

First, security concerns about the potential for misuse, and a more operational worry that Anthropic does not have enough computing power to serve 120 entities without degrading the government's own ability to use the model effectively.

The compute concern is not incidental. Part of the motivation behind Anthropic's current $900 billion fundraising consideration is specifically to secure sufficient infrastructure to run Mythos at scale.

The National Security Agency is among the government agencies currently using Mythos, and the White House's concern appears to be that broadening the rollout competes with that access.

The Mythos security breach that complicated everything

The White House objection arrives in the context of an already fraught rollout. On the same day Anthropic announced its limited release plan, a small group of unauthorised users in a private online forum gained access to Mythos.

The breach, the details of which remain unclear, underlined the gap between Anthropic's controlled-access design and the practical difficulty of containing access to a model of this capability, and has intensified government anxiety about any further expansion of the user base.

The model's capabilities are not in dispute. Mythos Preview autonomously discovered thousands of zero-day vulnerabilities across every major operating system and web browser in testing, succeeded on 73% of expert-level capture-the-flag cybersecurity tasks, and became the first model to complete a 32-step simulated corporate network attack end-to-end.

These are not hypothetical risks. They are documented capabilities that the US government has both cited as a security threat and apparently sought to monopolise for its own use through the NSA's access.

A 180 in progress: the White House's conflicted Anthropic position

What makes Wednesday's objection striking is its juxtaposition with a separate, simultaneous development; the White House is also currently developing an executive action that would allow government agencies to work around the Pentagon's supply chain risk designation of Anthropic and onboard its models, including Mythos.

The Pentagon designated Anthropic an unprecedented national security supply chain risk in early 2026, following a breakdown in negotiations over whether the US military could use Claude for autonomous weapons and domestic mass surveillance, two uses Anthropic's CEO Dario Amodei has publicly said he will not permit.

The White House is simultaneously convening companies across sectors this week to inform that draft executive action, including ‘table reads' of possible guidance, while also telling Anthropic it opposes its Mythos expansion plan.

White House chief of staff Susie Wiles and Treasury Secretary Scott Bessent met with Anthropic CEO Dario Amodei earlier this month in what both sides described as a productive introductory meeting.

The official White House line, that it is ‘balancing innovation and security while cooperating with the private sector', does not resolve the apparent contradiction between those two tracks.

The Mythos dispute is the most visible flashpoint in a genuinely novel regulatory situation: a company whose AI model is simultaneously used by the NSA, opposed by the Pentagon, courted by the White House for re-integration, and now blocked from expanding access to the civilian companies it had approved.

The outcome of this week's conversations will shape not just Anthropic's rollout plans but the broader question of how the US government intends to govern AI models capable of offensive cybersecurity operations.