Cut your Claude Code bill by routing routine turns to cheaper models
Published 2026-07-05 · KeepRouter
Claude Code is a joy to use — and, if every turn runs through the top-tier model, a fast way to burn credit. The good news: most turns don't need the top tier. Here's how to cut a Claude Code bill by 10–30× on the bulk of your work, without giving up Claude for the turns that matter.
The idea
A coding session is a mix of turns. A few are genuinely hard — a tricky refactor, a subtle bug. Most are routine — run the tests, rename a symbol, write a docstring, read a file. Routing the routine turns to a cheaper model and keeping a top-tier model for the hard ones captures most of the savings with almost none of the quality loss.
Claude Code speaks Anthropic's Messages API, and KeepRouter serves that API natively — so you can point Claude Code at KeepRouter and switch models with a single command.
Setup (two lines)
export ANTHROPIC_BASE_URL=https://keeprouter.com
export ANTHROPIC_AUTH_TOKEN=sk-kr-your-keyRun claude as usual, then switch models inside Claude Code with /model <id>.
The math
Take a typical turn: about 10,000 tokens of prompt (your repo context) and a 2,000-token reply. At KeepRouter's at-cost prices:
claude-opus-4-8— about $0.10 per turnclaude-sonnet-4-6— about $0.06glm-4.6— about $0.010deepseek-v3.2— about $0.003free— $0
Do the routine two-thirds of your turns on glm-4.6 or deepseek-v3.2 and you've cut that portion of the bill by 10–30×. The turns that need Opus still get Opus.
A rule of thumb
- Reading, renaming, tests, boilerplate, docstrings → a cheap model (
glm-4.6,deepseek-v3.2). - Design, tricky bugs, large refactors →
claude-opus-4-8orclaude-sonnet-4-6. - Just trying it out →
free($0).
Switching is one command, so you can change per turn as the work changes.
Try it
You'll need a KeepRouter key — new accounts get free trial credit, and the free model is always $0. Full setup guide with the model table: Run Claude Code on KeepRouter. Copy-paste examples: github.com/keeprouter/keeprouter-examples.