musistudio/claude-code-router

Claude-code-router sits between Claude Code and the model endpoints, letting a team decide per-request which backend actually handles the call — without forking the CLI or losing upstream updates. The practical payoff: run expensive reasoning on a full Sonnet endpoint but route boilerplate generation to a cheaper model, all transparently. What makes this worth attention over the usual proxy-wrapper is that it is designed explicitly to co-exist with Anthropic's update cadence, not fight it. The routing config is file-based and readable, so a solo founder or small team can reason about costs without instrumenting a full observability stack. Reservation: the documentation is sparse enough that initial setup will require reading the source, and the project is early — expect rough edges if your routing logic is non-trivial. -> Best for: SaaS team of 2-5 using Claude Code as primary dev tooling and wanting model cost controls