FAQ
Quick answers to common questions.
Is Clusy just Jupyter with a chatbot?
No, though the notebook surface is familiar on purpose. The differences that matter are an agent that runs the work loop (writes cells, runs them, reads results, iterates), branching that keeps your kernel state when you fork, and dual-face cells that hold both code and a plain-language description.
Do I have to let the agent write everything?
No. You can take over any time: write cells, edit the agent's, run things yourself. It picks up from whatever you leave. Plenty of people use it as a smart pair rather than a driver.
Where does my code run?
In an isolated sandbox with its own filesystem and kernel, not on your machine. CPU is free. GPUs are on paid plans and metered by the minute.
What's free?
The free tier includes the Auto model and CPU runtime, neither ever metered, plus a monthly allowance for heavier work. The everyday loop of Auto on CPU costs nothing. See the free floor.
What actually costs money?
Two things: calls to the metered models (everything above Auto), and time on a metered runtime like a GPU. Everything else, such as editing, branching, and reading output, is free.
Can I avoid a surprise bill?
Yes. By default, when your allowance runs out, Clusy drops you back to the free Auto-on-CPU loop instead of charging you. If you opt into pay-as-you-go, you set a monthly cap and a per-run limit so spending can't run away.
Which models can I use?
Auto on every plan, and on paid plans the mid-tier models (DeepSeek V4 Pro, Kimi K2.6) and the frontier Claude models (Sonnet 4.6, Opus 4.8 and 4.7). See Choosing a model.
How is a Clusy branch different from a Git branch?
A Clusy branch is a live experiment inside a notebook. It carries your kernel state and exists only in Clusy. A Git branch versions the notebook files. Use Clusy branches to explore, and Git to keep history.
Can I use my own data?
Yes. Upload datasets to the project workspace and the agent or your code reads them from disk. There's a per-plan storage limit.
Can I show my work to someone?
Publish a share link, a read-only view anyone can open with no account needed. They can read it, fork it to their own workspace, download the .ipynb, or open it in Colab.
Can I get my notebooks out of Clusy?
Always. Notebooks are .ipynb-compatible. Download them, commit them to GitHub as clean Python diffs, or publish to Hugging Face or Kaggle.
How do I extend what the agent can do?
Connect MCP servers under Settings → MCP servers to give it extra tools, like querying your own systems or hitting private APIs, with per-tool approval so you stay in control.
How do I sign in?
With an email one-time code, Google, or GitHub. No password.
How do I delete my account or a project?
Account deletion is in Settings → Account, and project deletion is on the project itself. Both are permanent and both ask you to confirm.
Something's broken. How do I tell you?
Settings → Help & feedback goes straight to the team. Concrete reports (what you did, what you expected, what happened) get fixed fastest.