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The coding agent that runs on other people's free tiers.

mooch connects to free AI model tiers from NVIDIA, Groq, OpenRouter and more. It plans, edits and tests your code. mooch is free, and on free tiers so is the AI.

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CALC-LIB
Open another folder Models ready Settings
CALC-LIB
src
math.tsM
index.ts
test
math.test.tsM
package.json
math.tsdiff
math.test.ts
1export function add(a: number, b: number) {
2 return a - b;
+ return a + b;
3}
4
+export function sub(a: number, b: number) {
+ return a - b;
+}
Penny nemotron-3.5-lightning-30b-a3b Ask first New chat
Deep thinking Review Backup Team…
NVIDIA NIM · nemotron-3.5-lightning
Penny is thinking…
Penny · add subtracts. I'll fix it, add sub with a test, then run the suite.
npm test running passed · 6.2s
✓ add adds
✓ sub subtracts
2 passed
src/math.ts +4 −1
Add a dark mode to the settings page.
Deep thinking · 3 models are planning
nemotron-3.5Put the colors in CSS variables. Swap them with a class on the page.
qwen3-coderSave the choice in localStorage so it sticks.
glm-5.3Follow the system setting until the user picks one.
Merged plangpt-oss-120b
  1. Move the colors to CSS variables
  2. Follow the system setting by default
  3. Save the user's choice
Write tests for the date parser.
nemotron-3.5-lightning waiting…cancelled
Quiet for 12s. Backup asked glm-5.3 too.
glm-5.3 working…answered · 4.1s
First answer wins. The slow request was cancelled.
Make the search faster.
Race · 3 agents, 3 copies of your project
nemotron-3.5tests ✓ · +38 −12 · 52s
qwen3-codertests ✗ · +20 −3 · 41s
glm-5.3tests ✓ · +14 −6 · 47s
glm-5.3 wins. Tests pass, smallest diff.Apply
Ask Penny to change something… (Enter to send, Shift+Enter for a new line)
Race Send
NVIDIA NIM · nemotron-3.5-lightning-30b-a3b $0.spent
Review gpt-oss-20b approved · 16s
Diff is minimal and both tests cover the change. Nothing to fix.
✓ 2 passed · 6.2s · nemotron

01 Ask

Say what to change.

Penny reads your project, edits the files and runs your tests. Every change shows up as a diff first.

02 Deep thinking

Several models plan together.

Two or three free models each pitch a plan. A judge model merges the best parts into one.

03 Backup

A slow model gets a backup.

Free models are sometimes slow. If one goes quiet, Backup sends the same request to another model. The first answer wins.

04 Review

A second model checks the work.

Before you see a change, a different model reads the diff and the test results.

05 Race

Agents race. The best one wins.

Several agents solve the task in separate copies. Passing tests win, then the smallest diff, then the fastest.

All of it

Runs on free tiers.

$0.00 spent

03 · Who we borrow from

Free tiers from the big names.

mooch connects to 61 model providers, cloud and local, and picks one for each job. If one hits its free limit, mooch switches to another and tells you.

61 providers
Groq hit its free limit. Switched to OpenRouter.

Provider names are trademarks of their owners. mooch is not affiliated with or endorsed by them. Each provider's own terms, limits and prices apply.

04 · Get mooch

Ready when you are.

Download mooch, paste a free API key from any of the 61 providers, and ask Penny for your first change.

Windows 64-bit macOS Apple silicon macOS Intel Linux AppImage Linux .deb

No credit card. No trial. v0.1.1 · All versions and release notes

coding agent + IDE

—#000000

  • Coding agent (Penny) $0.00
  • Deep thinking $0.00
  • Backup $0.00
  • Review $0.00
  • Race $0.00
  • 61 model providers $0.00
  • Subscription none
Subtotal
$0.00
Tax
$0.00
Total
$0.00

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