Treasury Secretary Scott Bessent spent two days in April warning bank executives at Treasury headquarters about Anthropic's Mythos hacking model. Four days later, his own department requested access to it.
The reversal, confirmed by Bloomberg and The Hill, is the most concrete signal yet that the administration's formal blacklist of Anthropic — the designation that placed the company on the Pentagon's supply chain risk list alongside foreign adversaries in March — is quietly collapsing under the weight of its own utility. The D.C. Circuit declined to pause that designation earlier this month, rejecting Anthropic's argument that it was political rather than security-based. Oral arguments are scheduled for May 19.
Three agencies that designated Mythos a supply chain risk are now the three most actively using it. The NSA has been running it since at least mid-April, independently corroborated by Reuters and TechCrunch. Treasury formally requested access. The Commerce Department's Center for AI Standards and Innovation is already testing the model, according to POLITICO. The agencies tasked with keeping the model out of government cannot agree on whether keeping it out is worth the cost.
Bessent spent days briefing Wall Street executives alongside Fed Chair Jerome Powell on what Mythos could do — finding hidden vulnerabilities in critical systems, the kind of work that used to take teams of analysts months. He was explaining the risk. Now he is requesting access to the same tool.
The practical accommodation is happening anyway. Mythos has identified thousands of undisclosed vulnerabilities in recent weeks, including a 27-year-old bug in OpenBSD, an operating system built around security assumptions, according to Anthropic's research blog. Anthropic described this as a capability emerging from general improvements in code and reasoning, not explicit security training. Security firm Aisle confirmed that older public models could replicate some of the vulnerabilities, though not the full exploit chain. Bruce Schneier called the capability jump credible and the urgency immediate.
Anthropic has maintained that it will not make Mythos broadly available. The company launched Project Glasswing, an initiative providing Mythos access to roughly 40 organizations, including Amazon, Apple, Google, JPMorgan Chase, Microsoft, Nvidia, and others, according to Fortune. The full list is not public. Neither Treasury nor the NSA has confirmed their participation.
A federal judge in California previously blocked the designation temporarily, finding that Anthropic had raised serious questions about whether the penalty was applied for legitimate national security reasons or as political punishment. That temporary block has since expired.
The reconciliation, such as it is, is happening anyway. The D.C. Circuit hears oral arguments on Anthropic's challenge to the supply chain designation on May 19 — the next test of whether the political blacklist can hold once the agencies tasked with enforcing it have already moved around it.