I Tested Every Gemini Model in Claude Code Router — Here's What Actually Works

I spent hours testing every Gemini model inside Claude Code Router — and the results were honestly surprising. Some models worked perfectly, some completely failed, and one model had this really weird bug where the response just disappears right in front of you. In this article, I'll show you exactly which Gemini models work and which ones don't, along with the exact configuration you need whether you're using the free API key or the paid one. What is Claude Code Router? Normally when you use Claude Code, every request goes to Anthropic's API — that costs money, and if you hit the rate limit, you're stuck. Claude Code Router is an open-source tool that sits between Claude Code and whatever AI provider you want to use. Claude Code thinks it's talking to Anthropic, but actually your request is being silently redirected to Gemini, DeepSeek, or any other provider you configure. This means you get the full Claude Code experience — all the agentic features, all the tools — but powered by a c