"OpenAI and Google Workers File Amicus Brief in Support of Anthropic Against the US Government" 9 March 2026

More than 30 employees from OpenAI and Google, including Google DeepMind chief scientist Jeff Dean, filed an amicus brief on Monday in support of Anthropic in its legal fight against the US government.

“If allowed to proceed, this effort to punish one of the leading US AI companies will undoubtedly have consequences for the United States’ industrial and scientific competitiveness in the field of artificial intelligence and beyond,” the employees wrote.

The brief was filed just hours after Anthropic sued the Department of Defense and other federal agencies over the Pentagon’s decision to designate the company a “supply-chain risk.” The sanction, which severely limits Anthropic’s ability to work with military contractors, went into effect after Anthropic’s negotiations with the Pentagon fell apart. The AI startup is seeking a temporary restraining order to continue its work with military partners as the lawsuit progresses. This brief specifically supports this motion...

...The brief also says that the red lines Anthropic claims it requested, including that its AI wouldn’t be used for mass domestic surveillance and the development of autonomous lethal weapons, are legitimate concerns and require sufficient guardrails. “In the absence of public law, the contractual and technological requirements that AI developers impose on the use of their systems represent a vital safeguard against their catastrophic misuse,” the brief says...

...OpenAI and Google did not immediately respond to WIRED’s request for comment...