This post was originally published on my Substack publication as How to Use Claude Code For Free With OpenCode Models.
Yes, you can use Claude Code for free by routing it through a small Cloudflare Worker and pointing that Worker at a free OpenCode Zen model like minimax-m2.5-free.
Claude stays the interface. OpenCode becomes the model layer.
That means you can keep the Claude experience people already like, skip Anthropic billing for low-stakes work, and only move to a paid provider lane when the task actually deserves it.
You see, at the end of March 2026, Anthropic shipped a Claude Code npm package with a source map inside it. That packaging mistake exposed a huge chunk of the Claude Code TypeScript source. Within hours, mirrors spread across GitHub. Some picked up thousands of stars and forks before Anthropic started sending takedowns.
