Yemen terrorist group used Anthropic's Claude AI, not engineers, to build a missile

Anthropic says it has shut down a cell of threat actors based in northern Yemen that used Claude to build guidance software for three weapons programmes running in parallel. The group was working on a guided rocket, a multi-stage ballistic missile with a stated range goal above 2,000km, and a multi-variant missile set called the R2000, which included a hypersonic glide vehicle. In its September threat report on detecting and countering misuse of AI, the company says the actors used Claude Code in place of human software engineers.The setup is the part that stands out. The cell did not simply ask an AI model for advice on a hard problem. It ran several Claude instances at the same time and assigned each one a role, the way a lead delegates work on a small engineering team. One instance wrote the code. A second handled research.