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Understand AI.
Build it yourself.

From your first token to your own language model. Learn with short lessons, write code and discover what happens inside AI.

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The model studio

From a sentence to the next token.

Interactive example

Sample input

KI lernt aus Daten.

5 tokensGerman sample

One sentence. Three steps. Explore the building blocks behind it.

„KI lernt aus Daten.“

  1. kiID 1
  2. lerntID 2
  3. ausID 3
  4. datenID 4
  5. .ID 5

The tokenizer splits the German sample into tokens and gives each one an ID.

What you learn here

Text becomes computable.

A language model works with numbers. Token IDs connect pieces of text to the vocabulary.

Simplified illustration with example values, not a trained model

The course: 10 sections, 250 lessons

From the foundations to your own project: each section builds on the last. 4 learning rooms let you try the ideas for yourself.

UnderstandTry itCheck
  1. Language model foundations21 lessons, free
  2. PyTorch foundations27 lessons, free
  3. Working with text data24 lessons
  4. Implementing attention33 lessons
  5. Building a GPT model21 lessons
  6. Pretraining on unlabeled data27 lessons
  7. Fine-tuning for classification24 lessons
  8. Fine-tuning for instructions27 lessons
  9. Efficient training and PEFT30 lessons
  10. Capstone: project plan and local checks16 lessons

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