For months, the fight between Anthropic and the Pentagon looked like a row over access to Claude. Court documents released this week suggest it was about something bigger: who decides how the US military uses frontier AI.
The emails came out on Tuesday, in one of the lawsuits Anthropic has filed against the Department of Defense. The Wall Street Journal first reported them. They trace a tense exchange between two men. One is Anthropic chief executive Dario Amodei. The other is Emil Michael, the undersecretary of defence for research and engineering.
The redline
Amodei’s position stayed consistent. He wanted guardrails on how the Pentagon could use Anthropic’s models. Two uses were off the table: fully autonomous weapons and domestic surveillance. Those are the same limits he set out when he questioned the military use of his models.
The Pentagon wanted something broader. It asked for the models to cover “all lawful uses,” a phrase that leaves plenty of room.
The 💜 of EU tech
The latest rumblings from the EU tech scene, a story from our wise ol’ founder Boris, and some questionable AI art. It’s free, every week, in your inbox. Sign up now!
The talks began to sour in January. Michael emailed Amodei after weeks of silence. He said he was “hoping that we are closer to engaging with your revised POV.” In plain terms, he wanted Anthropic to shift towards the Pentagon’s position. Amodei repeated his redlines instead.
‘Just not workable’
Michael was blunt. The guardrails were “just not workable,” he wrote. He offered Anthropic “one more chance to align on core principles” before the two sides split. He also rejected the line Amodei drew. “There is no distinction in our world between weapons that are defensive or offensive,” he wrote. Gizmodo published the emails from the court record.
Amodei pushed back on the “all lawful uses” standard. The problem, he noted, is that US law does permit domestic surveillance. He told Michael the Pentagon’s draft language went too far. It seemed to “completely remove our redlines.”
The next day, Defence Secretary Pete Hegseth designated Anthropic a supply-chain risk. That label usually applies to firms tied to foreign adversaries. It turned a months-long standoff into a court fight.
A conflicted negotiator
Michael’s role has drawn scrutiny. Financial disclosures show he held stock in xAI, an Anthropic rival, alongside other AI investments. The Guardian and ProPublica reported the holdings. Anthropic argues the blacklisting was retaliation rather than security policy. A federal judge agreed in late March. She granted a preliminary injunction.
She called the move “classic illegal First Amendment retaliation.” An appeals court reversed that in April, and the case continues. The dispute is one strand in Silicon Valley’s deepening ties to the Pentagon.
Why Europe should watch
The stakes reach past Washington. Anthropic is testing whether an AI company can set ethical limits on a government customer and keep its contracts. That question sits at the centre of Europe’s own arguments over military and surveillance AI. The EU AI Act is wrestling with the same lines. It also feeds the sovereignty debate, as European buyers weigh how much control any US lab keeps once its models enter national-security work.
For now, Anthropic has steadied itself. It overcame its latest clash with the administration this week, nearing a deal to restore access to a restricted model. The emails show how close the relationship came to breaking, and why.
