Foundations
What AI actually is, how it works, and the landscape of models. Start here.
The AI Moment
Why now? A brief history of AI waves and why 2023+ is genuinely different from the hype cycles before it.
How LLMs Work
Not a brain, not magic, not a search engine. What language models actually do — explained without math.
Prompts
The instruction you give an AI — and the hidden instructions already shaping its behavior before you say a word.
Understanding Tokens
The atomic unit of AI — what tokens are and why they affect cost, capability, and how models think.
Context Windows
Every conversation has a limit. How sessions grow, why long conversations degrade, and how frontier models compare.
The Model Landscape
The major AI labs, their actual safety records, and what open source AI means in practice.
Foundations Check
18 questions covering every topic in the Foundations trail. No consequences — just a way to see what stuck.