The Three Layers Developers Miss When They “Swap Models” (And Why Proxy‑Routing Claude Code Breaks All of Them)

Developers love shortcuts. But some shortcuts don’t collapse build time—they collapse the trust boundary. A new proxy tool is circulating that lets you point Claude Code at a local endpoint and silently swap in DeepSeek, Qwen, GLM, MiniMax, or Kimi as the backend. The pitch is simple: “Free Claude Code. No API bill.” The reality is simpler: You are not swapping a model. You are swapping the entire inference substrate. This article breaks down the three layers developers routinely overlook when t