Learn AI by using it

Beginner · 1 lesson · Premium

Build an LLM From Scratch

Start at y = mx + c. Finish with your own model running an agent.

Twenty-four lessons, zero to hero: start at a single line of best fit and end with a small language model you trained yourself, wired into a working AI agent. Every idea is built by hand before it's named — no assumed math, no black boxes.

• ·Train a tiny language model on real text, from raw gradients to a working GPT
• ·Understand attention, transformers, and fine-tuning from first principles — no black boxes
• ·Fine-tune, align (DPO), and run inference on your own model
• ·Build a working AI agent — tools, memory, and RAG — on top of a model you trained yourself