CodeDuel: Compete against AI

CodeDuel puts you head-to-head against Claude AI on real coding problems. Same problem. Same time. One winner. You write your solution in a VS Code-style editor. Claude generates its solution simultaneously. Both run against the same test cases. Scored on correctness, speed, and code quality. After every duel Claude explains its approach so you actually learn something. Free to start. Pro at $6/month — 7-day free trial, no credit card required.