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ResearchSame model, 21 real issues: half the cost per fix

One Coder in front of every coding agent you use

Coder works out what each step needs. Small steps go to small, fast models; only the hard parts reach the big one.

Download CoderHow it works

Most coding agents send every step to one big model: finding a file, reading it, running a command, writing the fix. You pay big-model prices, and wait big-model times, for work a small model does just as well.

Coder sits in front of the agent you already use and decides, step by step, what each one needs. The agent stays the same; the bill and the wait get smaller.

Routing

Only the hard parts reach the big model

Every message stops first at a ring of quick decisions: route, brief, trim, gate, check. Finding and reading go to small, fast models; only the fix goes on to the big one.

How Coder works
Another harness: every step goes through the big model.
Another harness
Coder: quick decisions in front, only the fix goes to the big model.
Coder

$1.84

per accepted fix, instead of $4.00

121 s

median time, instead of 284 s

21

real issues, same model both ways

Read the study

Agents

Keep the agent you use

Claude Code, Codex, OpenCode, Grok Build, Devin CLI and Cursor all run behind the same Coder. Shift+Tab steps from one to the next; Auto picks for you.

Download Coder
One Coder in front of every agent.

Safety

Hard-to-undo steps wait for you

Reading, editing, running tests and pushing go straight through. A deploy, a merge, a secret, a payment or a DNS change stops and waits until you press Y or N.

Hard-to-undo steps wait for you.

Every step in view

See what it read, ran, and changed

Each step shows as it happens, with the model that did it. Follow along in the terminal, on the web, or on your phone, and build more than code.

The total in the cart is off by one. Fix it.

  1. Readsrc/cart.rssmall model
  2. Bashcargo test cart1 failed
  3. Editsrc/cart.rsbig model
    -    (0..=items.len()).map(|i| items[i].price).sum()
+    items.iter().map(|item| item.price).sum()
  4. Bashcargo test cart12 passed

Fixed: the sum read one item past the end. The cart tests pass.

A fan mounting bracket designed in a chat on OpenAgents
ExampleDesign a part by talkingAsk for a 40 mm fan bracket, then pick a face and change it. Every version is kept to compare. CAD Lab is part of Pro.

How it works

Three steps

  1. 01

    Install

    One line in your terminal:

    curl -fsSL https://openagents.com/cli/install.sh | bash
    irm https://openagents.com/cli/install.ps1 | iex
  2. 02

    Pick your agents

    Coder finds the agents you have installed. Shift+Tab steps between them, or leave it on Auto.

  3. 03

    Work

    Ask for what you want. Coder sends each step where it belongs and holds the risky ones for you.

Pricing

Free to start

Free

$0

  • Coder in front of the agents you use
  • A free daily model allowance
  • OpenAgents on the web and your phone
Download Coder

Pro

$20/mo.

  • Everything in Free
  • Cloud agents that keep working with your laptop closed
  • Cloud time, uploads, and advanced projects
  • Model usage included each month
  • CAD Lab: design parts by talking
See plans

Enterprise

Custom

  • Everything in Pro
  • Deploy on our cloud, your cloud, or your own machines
  • SAML single sign-on and SCIM
  • Uptime SLA and priority support
  • Audit logs, invoicing, and a security review
Contact sales

FAQ

Questions

Which agents does Coder work with?

Claude Code, Codex, OpenCode, Grok Build, Devin CLI, Cursor, and Auto, which picks for you.

Do I have to change how I work?

No. You keep the agent you use; Coder sits in front of it.

Is it open source?

Yes. The code is on GitHub.

What waits for me?

Steps that are hard to undo: a deploy, a merge, a secret, a payment, a DNS change. Press Y to allow or N to deny.

Pay for the hard parts only

Install Coder and keep the agent you already use.

Download Coder