Filing: Microsoft files an amicus brief in support of Anthropic and advocates for a temporary restraining order to block the DOD's supply chain risk designation
Microsoft threw its support behind Anthropic on Tuesday, saying a judge should issue a restraining order that would block …
CNBCAshley Capoot
Context & Ripple Effects
Microsoft's intervention follows Anthropic's lawsuit challenging the DOD designation, turning the dispute from a company-versus-government case into one with support from a major technology partner. That matters because the designation's effects can extend beyond Anthropic to firms that depend on its services or view it as a supplier.
The litigation remained contested: a judge later granted Anthropic a preliminary injunction, while a DC appeals court later denied a bid to pause the designation. The sequence makes Microsoft’s filing an early marker of how consequential the designation was seen within the AI supply chain.
First-order effects
Microsoft formally adds its legal weight to Anthropic's request for immediate court relief, strengthening the record against the DOD designation.
Anthropic gains support from a prominent industry participant as it seeks to prevent the designation from taking effect during the case.
Second-order effects
The DOD must defend the designation against arguments not only from its target but also from a major technology company with a direct interest in AI supply relationships.
Other AI vendors, customers, and partners have a clearer signal that supply-chain-risk designations can become commercially material and litigated rather than accepted as a routine procurement constraint.
Third-order effects
If courts continue to scrutinize these designations, national-security supply-chain tools may face a more defined legal boundary when applied to AI providers.
The case points toward AI labs seeking strategic legitimacy through coalitions of customers and technology partners when government actions threaten their market access.
The trend: AI providers and their commercial allies are increasingly treating government supply-chain decisions as a core legal and market-access risk.
Microsoft is exposed, and that's the real reason it's supporting Anthropic against the government. Microsoft integrates Claude into products it sells to the U.S. military. When the Pentagon designated Anthropic a supply chain risk, it gave itself six months to phase out Claude
Microsoft's amicus is quite interesting. The main vibe of the brief is “lets all take a deep breath and pause this SRC designation so the parties can come back to the table to figure this out and avoid any disruption.” Relevant section below [image]
Hats off to @Microsoft for doing the right thing here. Every company should join because every company should be worried about the federal government nuking a company on a whim. If they can go after a frontier AI company, the can go after any company.
Notable, especially given that Amazon CEO Andy Jassy reportedly declined to support Anthropic during a meeting with Pete Hegseth — despite Amazon's $61bn stake in the AI startup. Meanwhile Microsoft, a competitor, has now backed Anthropic in court...
@ddimolfetta @not_amazn_alexa I got this result recently. GPT 4.1 is not only unintelligent compared to newer models but also very sycophantic. It will confirm their biases. Really bad idea. [image]
Anthropic's lawyer claims in court that the government's attempted reprisals in fact extend to reaching out to private companies and urging them to stop doing business with Anthropic.
said that a fintech company cut a contract from $10M to $5M and that universities & business-to-business companies have switched to other providers. Said govt is affirmatively reaching out to their customers & urging them to stop working with Anthropic. They fear an executive
Atty Michael Mongan (WilmerHale) for Anthropic said they feared invocation of the Defense Production Act to “commandeer our technology” and threats of criminal consequences. Said that more than 100 enterprise customers had already expressed doubts about continuing to use them ...
The status conference in the Anthropic case in ND Calif just ended. Judge Rita Lin set a preliminary injunction hearing for 3/24 at 1:30pm PT. DOJ wanted later, but would not commit to not taking additional onerous actions against Anthropic before then ... 1/6