The Hack Everyone Was Looking For

Claude Code's interface is brilliant. The way it reads your codebase, the tool use, the agentic loop, the way it handles multi-file changes. Proper best-in-class developer experience. But here's the rub: it only talks to Anthropic's API. And Anthropic's API pricing is... not cheap. Especially if you're burning through Opus tokens like they're going out of fashion.

Claude Code Router by musistudio is a middleware proxy that sits between Claude Code and the actual API endpoint. It intercepts the API requests and routes them to whatever provider you want: OpenRouter, DeepSeek, Ollama, Gemini, Volcengine, SiliconFlow. You keep Claude Code's UX. You pay someone else's prices. Or you pay nothing at all if you're routing to a local Ollama instance.

31,400 stars. 2,500 forks. That's not a niche tool. That's a movement.

How It Works

The setup is dead simple. You run the router as a local proxy server, point Claude Code's API base URL at it, and carry on as normal. Claude Code thinks it's talking to Anthropic. The router intercepts the request and forwards it to your configured provider.

The clever bit is the routing rules. You don't have to send everything to the same model. The router supports rule-based routing by task type:

• Background tasks (file analysis, indexing) can go to a cheap model
• Long context operations can go to a model with a bigger window
• Thinking/reasoning tasks can stay on Claude Opus if you want the best output
• Web search can route to a model with native search capabilities

So you end up with a setup where the expensive model only handles the tasks that actually need it, and everything else goes to something cheaper. Same Claude Code session. Multiple models under the hood. Your token bill drops off a cliff.

Who This Is For

Couple of obvious use cases.

Cost-conscious teams. If your company is paying for API access and the bills are eyewatering, routing background operations to DeepSeek or a local model cuts costs dramatically without changing developer workflow. The person using Claude Code doesn't even know the routing is happening.

API-less users. If you don't have an Anthropic API account (or don't want one), this lets you use Claude Code with whatever API you do have access to. Got an OpenRouter subscription? Sort. Running Ollama locally? Also sort. Just want to use Google's Gemini API because your company already pays for it? Done.

Model experimenters. Want to see how DeepSeek handles the same coding task as Claude? Route one session through Claude, another through DeepSeek, compare the output. The router makes model comparison trivial because the interface stays identical.

The Tradeoffs

Let's be honest about what you lose.

First, you lose Anthropic's model. If you're routing to DeepSeek or Gemini, you're getting DeepSeek or Gemini quality, not Claude quality. The Claude Code interface makes any model feel better than it would in a plain chat window, but it can't make a weaker model into a stronger one. If Opus is the right model for your task, no amount of routing optimisation changes that.

Second, you lose native features. Extended thinking, certain tool-use behaviours, the specific way Claude handles multi-step reasoning inside Claude Code. Some of these are model-specific capabilities, not just API features. A routed model might not support extended thinking at all, or might handle it differently enough to cause odd behaviour.

Third, there's latency. Every request goes through an extra hop. For most tasks the overhead is negligible, but if you're doing latency-sensitive work (real-time agent loops, fast iteration cycles), the extra milliseconds add up.

📚 Geek Corner

Rule-based routing is the interesting bit. Most people think of this as "swap Claude for a cheaper model." That's the basic use case. The power move is mixed routing: keep reasoning on Opus, put file analysis on Haiku, and route boilerplate generation to a local model. The challenge is that Claude Code's API calls don't come with explicit "this is a background task" labels. The router has to infer intent from the request shape, model parameters, and sometimes the prompt itself. This means routing rules are heuristic, not deterministic. In practice it works well enough for most workflows, but edge cases exist. If a background task accidentally routes to your cheap model and the cheap model makes a mess of it, Claude Code's next step might build on that mess. The error doesn't stay contained. It's the same cascading problem that plagues all multi-model architectures: the weakest link in the chain determines the floor of your output quality.

Alternatives

ccproxy by starbaser takes a different approach. It's built on LiteLLM and adds intelligent routing rules (TokenCountRule, MatchModelRule, ThinkingRule, MatchToolRule) plus custom hooks. Smaller community (182 stars) but more granular routing control. It can even expose your Claude MAX subscription as an API endpoint for other tools to use, which is either brilliant or terrifying depending on how you feel about your rate limits.

If cost is the main concern and you're on a Pro or Max subscription, check ccusage first. You might find your usage is lower than you think and the routing complexity isn't worth it.

Getting Started

Check the docs for setup. It's a Node.js proxy, so npx or npm install, configure your providers, point Claude Code at it, and go.