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Tokens, from zero
Understand the pieces AI reads, the numbers behind them, and the bill you pay. Thirteen short lessons with worked examples, no-code exercises, self-checks and interactive quizzes.
$49 one-time
Start free with chapters 1, 2 and 7: what a token is, how text is chopped, and what it costs. The full course goes into context, language differences, images, audio, reasoning and a hands-on lab.
Buy the full course - $49Secure checkout by Stripe. One-time purchase; tax may be added based on your address. Save the course-start link shown after payment.
Best value: all three courses (Tokens, Agents and Commerce) for $149. Buy the bundle - $149 ↗
THE COURSE
Thirteen chapters, one clear path
- 01Read free chapter ↗
What is a token?
4 min read · Free chapter - 02Read free chapter ↗
How text gets chopped up
4 min read · Free chapter - 03
How the chopping rules are learned
4 min read · Full-course chapter - 04
From tokens to numbers to meaning
4 min read · Full-course chapter - 05
How a model writes: one token at a time
4 min read · Full-course chapter - 06
The context window: the model's desk
4 min read · Full-course chapter - 07Read free chapter ↗
Tokens as money: how AI is priced
4 min read · Free chapter - 08
Why the same idea costs more in some languages
4 min read · Full-course chapter - 09
Where tokens break: strange glitches and limits
4 min read · Full-course chapter - 10
The ideology of tokens: what the unit does to the world
6 min read · Full-course chapter - 11
Tokens beyond text: pictures and sound
3 min read · Full-course chapter - 12
Reasoning tokens: the model's scratch paper
4 min read · Full-course chapter - 13
Hands-on lab: be the tokenizer
4 min read · Full-course chapter
What this course is and is not
Self-guided reading and practice, not a live teacher or a certificate. Prices and toy token counts are illustrative. The full-course links follow A1's unlisted-link format, not account-based access control.