Free · open source · no money, no crypto

Chat with an AI that runs on
somebody's spare graphics card.

A 27B open model, answered by volunteers' browsers instead of a data centre. Ask it something on any device, no download. Or keep a tab open and let your graphics card answer other people, which is how you earn the AI Coins that pay for your own questions. One Google sign-in covers both.

Any device

Chat with the swarm

Nothing to download and no GPU needed. Sign in with Google once and you start with 1,000 AI Coins — enough for a few hundred answers.

Start chatting Needs a real GPU

Share my GPU

We test your browser first and tell you honestly whether it is fast enough — before anything is downloaded. Roughly 12 GB of graphics memory and up.

Check my GPU
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GPUs online
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Swarm speed
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Tokens served today
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People here

– ready right now · – requests waiting · every number comes straight out of the ledger.

How it works

Step 1

Open a tab

The model (5.9 GB, ternary-quantised) downloads once and stays in your browser's storage. It runs on your GPU through WebGPU in a Web Worker, so it keeps working while the tab sits in the background.

Step 2

Earn AI Coins

You earn coins for every minute you are online and ready, and more for every token your GPU actually generates for someone else. Levels, streaks and badges come along for the ride.

Step 3

Spend them

Chatting costs coins per token. New accounts start with a welcome budget, so you can try the swarm before you ever share anything. Your balance can never go negative.

The trick is time zones: your machine is idle while you sleep, and somebody twelve hours away is awake and asking. See the exact rates →

Be honest with me

What it takes to provide

  • ≥ 12 GB of GPU memory, 16 GB is comfortable. Apple Silicon Pro/Max with ≥ 24 GB unified memory works too.
  • A 5.9 GB one-time download and up to ~10 GB of extra system RAM while loaded.
  • Measured on an 8 GB RTX 4060 laptop: 2.5 tokens/s — the weights spill out of VRAM. That machine can chat but is not admitted as a provider.
  • Admission runs a real benchmark in your browser and needs 5 tokens/s — about reading speed. Faster GPUs are always asked first. On Windows, sharing from llama.cpp is several times faster than the browser.

What you are agreeing to

  • Strangers' prompts run on your machine while you share. They are relayed by our coordinator and never stored — but they pass through your browser.
  • Your prompts run on a stranger's machine. Don't send anything personal or secret.
  • A 27B ternary model is small. Code and arithmetic are decent; factual questions — especially in German — can be confidently wrong.
  • No money is involved anywhere. AI Coins have no value outside this network and never will.

Top providers

Nobody has opted into the public leaderboard yet.
Full leaderboard

Run it from the command line

The downloadable client does both sides: it shares your GPU — through your own llama.cpp server, or a real Chrome with the throttling switches off — and it exposes OpenAI Chat Completions, OpenAI Responses and Anthropic Messages compatible endpoints on 127.0.0.1:4777 so your existing tools can use the swarm.

# Node.js 22+, then in the client folder of github.com/fstandhartinger/bonsai-swarm (no npm install needed)
node bin/cli.js login                                 # paste an API token from your wallet page
node bin/cli.js provide --local http://127.0.0.1:8080 # share through your llama.cpp server
node bin/cli.js provide                               # or: share through a browser
node bin/cli.js serve                                 # OpenAI / Responses / Anthropic on 127.0.0.1:4777
Client README ↗ API docs

Built on other people's good work

The model is Ternary Bonsai 2 27B by Prism ML. The WebGPU kernels that make it run in a browser come from the webml-community space by Xenova / the transformers.js community. This network is the thin layer that lets those browsers find each other.

Bonsai Swarm is a one-person hobby project and the coordinator servers cost real money. If it is useful to you, you can support this project with whatever amount you like. It buys no AI Coins and no priority — the swarm stays free for everyone. Payments go to productivity-boost.com Betriebs UG (haftungsbeschränkt) & Co. KG, the one-person company behind these projects.

Join the swarm