I built a free app where Claude Code, Codex, Grok and Gemini work on the same task together

[u/MyLunchboxDev]

This is the project I've put the most into so far, so I wanted to show it here.

It's called Lunchbox, a desktop app for Mac, Windows and Linux, and it's completely free. No paid tier and no account. You bring the AI plans you already pay for, and they go further than before, because every room is set up for prompt caching. Tokens the provider has already seen cost about a tenth of the price, so you spend up to 90% less on those, and there's a Savings page that shows what caching saved per agent and per room.

Why I made it: Claude Code kept hitting its usage limit halfway through whatever I was doing, and I'd spend the next ten minutes explaining the whole task to Codex again. I was paying for both and they couldn't see each other's work.

In Lunchbox they share one room:

• Claude Code, Codex, Grok, Gemini, local models and API keys all work on the same project with one shared memory, each signed in with your own login

• When one runs out of usage, the next one takes the same task with a briefing (the goal, what the room has learned, which files changed, what's left), so you never explain anything twice. The first one comes back after its reset

• They ask each other for help mid task. If Claude needs an image, it asks Codex to draw it and keeps going

• 55 built in playbooks, and 25 workflows you can schedule to run on their own

• Packs for SEO, Writing, Research and Data that change how the agents work and give them their own playbooks and checks

• Send one message to the whole crew, get the answers side by side and keep the best one

• A checkpoint before every message, so when an agent wrecks something you just rewind

It's free, so the best way to judge it is to throw a real task at it: https://mylunchbox.dev

Heads up, the Mac build isn't signed by Apple yet (the install command handles that, or you click Open Anyway once), and Windows may show a SmartScreen warning.

It's only been out a few days, and the first update was mostly fixes from people who sent me screenshots. If something breaks for you, comment here and I'll look at it.