Demo Explore two complete courses. Your reading progress is saved in this browser.

Settings

Choose the AI model and the way it explains things.

A preview of the full application

Course creation and AI settings are available in the local application. These controls are disabled in the public demo. Explore the prepared courses and try the exercises instead.

Library

AI source

The application uses Codex running on this computer.

AI model

Models available in your Codex account. Image support and usage limits depend on the selected model and account.

Reasoning level

Available levels depend on the model. Higher levels allow more reasoning effort and may take longer to respond.

Tone and style instruction

Up to 1,000 characters. These preferences guide tone and explanation style; course structure and editing rules still apply. Leave blank for the usual style.

Changes apply to new courses and subsequent messages. Started generation and retries keep their original settings. These settings are shared by the local application.