Iran-linked actors used Claude to target U.S. warships and develop missiles

Anthropic reported that two Iran-linked groups used Claude for military tasks: one prepared targeting data for U.S. Navy ships, another used Claude Code for three weapons programs, including a missile with over 2,000 km range. No working weapons were created, and accounts were banned.

• Iranian group used Claude for targeting U.S. Navy ships
• Yemeni cell ran three weapons programs via Claude Code
• One missile claimed with range over 2,000 km
• Anthropic banned accounts and added detection measures