CodeMuxThe right model for each step
Planning, implementation, and review can each use a different model. Independent parts of a task run in parallel when they don’t touch the same files.
Multi-model coding · Inside VS Code
One task.
The right models.
A result you can review.
CodeMux plans, codes, and reviews each task with the model suited to that step — OpenAI GPT, Anthropic Claude, DeepSeek, or xAI Grok — then shows you the diff, the checks, and the cost in one place.
Free to install · No subscription · Your API or ours
CodeMux / WorkspaceIllustrative example
Your task
Fix checkout validation.
Add a regression test.
GPTClaudeDeepSeekGrok
PlanDefine the scope
ImplementMake the change
ReviewInspect the checks
checkout.tsExample diff
− if (!email) {+ if (!isValidEmail(email)) { return showError(); }Changes, checks & gapsReady for your review
Workflow illustration, not a recorded run. Models and checks vary by task.
One workflow, four providers
OpenAIAnthropicDeepSeekxAI
See the full catalog Why CodeMux
Stay in control from request to review.
Use a different model where it helps, and keep every result in one place.
Changes you can inspect
Every run shows the files it changed, the checks it ran, and what it could not verify — so you know exactly where to look before you accept.
Costs you can see
Each run shows its total and which model handled which step. Managed models share one balance; your own API is billed by your provider.
How it works
From an open repository to your first result.
Four steps, all inside VS Code 1.93 or later.
Need a hand? Contact supportInstall and open a project
Install CodeMux from the Visual Studio Marketplace, then open your repository in VS Code.
Sign in and pick how you pay
Open the CodeMux sidebar. Fund a managed balance, or connect a compatible API of your own.
Describe the change
Say what you want to happen and how to check it. Routing picks the models by default; you can override it.
Review and accept
Look over the changed files, the checks that ran, anything still unverified, and the cost — then decide whether to keep it.
Pricing
Free extension. Pay only for what runs.
No subscription and no seat fee. Choose how you want to pay for model usage.
See pricing detailsManaged models
Top up one CodeMux balance and use any model in the managed catalog. Start from $5.
Your own API
Connect a compatible endpoint. Your provider bills you at its own rates; CodeMux charges nothing for these requests.
Do I need to choose a model?
No. Automatic routing is the default. Set model preferences only when you want more control.
What does “verified” mean here?
CodeMux runs your repository’s checks and records the results, including anything it could not verify. You review the changes and the evidence before accepting them.
How does billing work?
The extension is free. Managed models draw from a pay-as-you-go balance. If you connect your own API, your provider bills you directly and CodeMux charges nothing for those requests.
Start with one task.
Open your repository, describe the change, and review the result. Free to install, nothing to subscribe to.