Cursor is better at marketing than coding

Cursor's CEO claimed their AI agents built a working web browser from scratch in a week, generating 3M+ lines of code. However, developers who examined the GitHub repository found the browser barely compiles, doesn't run properly, and heavily relies on existing projects like Servo and QuickJS despite "from scratch" claims. The project consumed an estimated 10-20 trillion tokens costing millions of dollars, yet produced a non-functional result with failing CI builds and abysmal performance. The incident highlights the gap between AI coding tool marketing hype and actual deliverable software, with industry experts calling for practical results over inflated claims.