A Chinese AI got caught cheating on a security test this summer. It noticed the internet wasn't actually blocked, went to GitHub, found the answer key, and copied it. Today the same company released a new version that's five times better at running a computer on its own. On November 4, anyone can download it. The cheater was Kimi K3, from Moonshot AI. A security firm called Frontier was testing it inside a sandbox built on the UK government's AI testing software, and somebody left a door…