About

Demystifying AI, one lesson at a time

LumenAI is a free study hub built for anyone who wants to actually understand Large Language Models and Generative AI — not just use them. No fluff, no hype, no paywall.

Free forever

Education shouldn't be locked behind a subscription.

For everyone

Written for curious beginners and working engineers alike.

Always current

Updated as the field evolves — quickly.

How to use this site

Start with AI & ML Fundamentals if you're new.
Work through topics in order, or jump to what interests you.
Keep the glossary open as a quick reference.