HexaHype
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Interactive AI & ML lessons

Understand how AI
actually works, from the ground up.

HexaHype is a growing library of hands-on lessons on machine learning and AI: full courses, short reads, and guided paper walkthroughs. Each one is built from first principles, with worked examples and runnable code that make the ideas stick.

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2 tracks live · 17 lessons · ~92 min · free to read, more on the way

A path through modern AI

Start with the building blocks and work up to generative AI. Follow it end to end, or jump in wherever you like.

  1. 1

    Stage 1

    Foundations

    The building blocks every model is made of.

    Neural Networks Short course 2 parts · ~9 min

    Build a neural network from its smallest piece, one neuron at a time.
  2. 2

    Stage 2

    Architectures

    How those blocks assemble into the models running today.

    How Language Models Actually Work Course 15 lessons · ~83 min

    A first-principles path through tokens, embeddings, attention, and the machinery behind LLMs, built up step by step.

    Diffusion & Image Models Short course ☕ Brewing coming soon

    How models paint a picture by reversing noise, step by step.

  3. 3

    Stage 3

    Generative AI, in depth

    Put models to work: steer them, ground them, and let them act.

    Prompt Engineering Short course ☕ Brewing coming soon

    Get reliable, repeatable output from any model: context, instructions, and proven patterns.

    Retrieval-Augmented Generation Short course ☕ Brewing coming soon

    Give a model your own documents so its answers stay grounded in your facts.

    AI Agents Short course ☕ Brewing coming soon

    Models that plan, call tools, and act in a loop to finish real tasks.

    Training & Fine-Tuning Course ☕ Brewing coming soon

    How models learn from data, and how to adapt a pretrained model to your own task.

  4. 4

    Stage 4

    From the source

    Guided, plain-language reads of the papers that shaped the field.

    Attention Is All You Need Paper explainer ☕ Brewing coming soon

    A walkthrough of the paper that started the transformer era.

Your personal study layer

Reading is free and needs no account. Sign in and the lessons turn into a study tool that remembers you.

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Progress that follows you

Every lesson remembers where you stopped, on any device, so you always pick up where you left off.

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Highlights & notes

Mark up the text and jot your own notes. They stay anchored to the exact passage.

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Spaced review

Key ideas come back on an FSRS schedule, right before you would forget them.

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Exercises

Predict outputs, trace algorithms, and check your understanding with instant feedback.

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Focus mode

Hide every distraction and read full-screen, like a calm, paginated book.

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Themes, synced

Light, sepia, and dark, plus all your data, kept in sync across your devices.

📖 Free, no account

  • Every track, start to finish
  • Nothing stored on a server
  • Zero tracking

✨ With a free account

  • Progress tracking
  • Highlights & notes
  • Spaced review, synced across devices
  • Dark & sepia themes
  • Full-screen focus mode

Never tracked when you're signed out. With an account we store only your email and your own notes, never sold, no ads. Delete it anytime and it's gone for good.