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Run real code

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Pyodide runs NumPy, matplotlib, and your code right in the page. No setup, no Colab tab dance.

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Your key, your model

AI tutor that knows the lesson

Anthropic, OpenAI, Google, OpenRouter, Ollama, DeepSeek — anything. We never spend on AI, you do.

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Made for beginners

Visualizations that click

Drag arrows, slide softmax temperature, step through matmul — feel the math before you see it.

The 14-phase roadmap

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  1. P01

    Math & ML Refresher

    The vector + gradient + probability foundation every LLM idea rides on.
  2. P02

    Deep Learning Foundations & PyTorch

    Write training loops you understand down to autograd. Debug exploding gradients with confidence.
  3. P03

    NLP Fundamentals

    From word vectors to attention — and why attention won.
  4. P04

    Transformers Deep Dive

    Implement multi-head attention and a full decoder-only Transformer from a blank file.
  5. P05

    Modern LLM Architectures & MoE

    Llama 4, Qwen3, DeepSeek V3/R1 — what's actually inside the frontier.
  6. P06

    Pre-Training — Scaling, Data, Distributed Systems

    Estimate compute-optimal trade-offs; use FSDP and parallelism that doesn't OOM at 3am.
  7. P07

    Fine-Tuning & Alignment

    Take a base model to instruction-following with the right algorithm for your budget.
  8. P08

    Prompt Engineering & Reasoning

    From ad-hoc prompting to a real vocabulary — CoT, self-consistency, budget forcing, reasoning models.
  9. P09

    Retrieval-Augmented Generation

    Build a production-grade RAG that beats naive cosine-similarity on your own eval.
  10. P10

    Agents, Tool Use, and MCP

    Multi-tool, stateful, durable agents. Expose your tools to the world via MCP.
  11. P11

    Evaluation

    Trustworthy evals before you trust any output. Goodhart's law in practice.
  12. P12

    Deployment & Inference Optimization

    Serve at >1000 tok/s/GPU. Quantize down to consumer hardware without losing your benchmarks.
  13. P13

    Safety, Alignment & Interpretability

    Red-team your own model. Reproduce a basic SAE. Understand current limits of mech interp.
  14. P14

    Research Track — Reading, Reproducing, Publishing

    Read 1 paper/week with full understanding. Reproduce one paper per quarter. Ship a preprint.