Playground
A real Python shell and an AI tutor, both running on your own computer rather than on our servers. Install packages, keep variables between commands, ask questions. Nothing you type here leaves your browser, and none of it costs anything.
Run a language model on your own computer.
It downloads once, then runs entirely in this tab. No account, no key, no cost, and nothing you type is sent anywhere. How fast it answers depends on your machine.
The conversation appears here once a model is loaded.
A small model makes mistakes. The lessons and the judge are the sources of truth here.
Why it is free
Everything runs in your tab. There is no server to pay for, so there is no limit and no account.
What it costs you
A download the first time, and your own processor after that. Speed depends on your machine, which is the honest trade.
How it differs from Practice
Practice grades your solution against real test cases on a server. This one explores and never grades anything.