Chinese models now occupy the top five spots on OpenRouter — AI's main developer marketplace — by weekly token usage. All five models — from Tencent, Xiaomi, DeepSeek, MiniMax, and Z.ai — are open-weight, meaning developers can download, customize, and run them on their own infrastructure. This isn't a curiosity anymore; it's a structural shift. Companies are actively migrating away from premium US frontier models toward cheaper Chinese alternatives. As...