It's definitely been reported before that Claude was used for Iran attacks, at the beginning of March or earlier:
https://www.theguardian.com/technology/2026/mar/01/claude-an...
Edit: Also, https://www.washingtonpost.com/technology/2026/03/04/anthrop...
"The U.S. used Anthropic's Claude to support Operation Epic Fury against Iran yesterday, sources familiar with the Pentagon's operations tell Axios."
OK. The US probably also used telephones and Diet Coke.
Nothing cited said that Claude was selecting targets or informing target selection.
Amodei looks absolutely prescient for taking a stand against use of Claude in the kill chain. Not to mention how utterly foolish DoD looks declaring Claude to be a national security threat while simultaneously using to choose targets. No wonder they got humiliated in court.