Five-minute AI explainers
AI, agents and models, explained in five minutes.
Plain words, one clear diagram, and a source behind every fact. Follow a guided course from what AI is to running it in production, take one five-minute lesson a day, or look up the one term you need. Every explainer is checked against official sources, and the sources are re-checked every night.
- Free and open source
- No sign-up
Everything on the site
Free for everyone, open source, and no sign-up. Every explainer is checked against official sources.
Find your way
Start here
A guided course in 5 parts and 29 chapters, at two levels: “I’m new to AI” or “I know the basics”.
Daily lesson
One five-minute lesson a day, picking up where you left off on your device.
Glossary
About 800 AI terms in plain words, best match first, over 300 with a full five-minute explainer.
AI news
A daily edition at 7 PM ET, with the publisher and original source on every story.
Every explainer
Short answer
The idea in one line, before anything else.
How it works
One clear diagram of the mechanism.
Example and comparison
A real example and how it compares with related ideas.
Limits and sources
Limitations, numbered sources and a last-checked date.
See it in action
Real screens from whatisai.fyi.
Home One clear next step: start lesson 1 or continue where you left off, search any term, and today’s AI news right below. Open on whatisai
Start here A guided course in 5 parts and 29 chapters, at two levels: “I’m new to AI” and “I know the basics”. Open on whatisai
Daily lesson Five minutes, one new idea: today’s lesson, your progress on this device, and what’s coming up next. Open on whatisai
Glossary About 800 AI terms, searchable with the best match first, by category or A to Z. Over 300 have a full five-minute explainer; the rest a short, sourced quick explainer. Open on whatisai
AI news A daily edition at 7 PM ET: a top story, what else happened, and recent highlights by topic, each with its publisher and original source. Open on whatisai
Explainer What is RAG? A short answer, one diagram, a real example, limits and numbered sources. Open on whatisai
Any AI idea, in five minutes
Free, open source, no sign-up.