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Build a modern LLM from scratch. Every line commented. Explained like we are five.

2,291 starsJupyter Notebook

How-to-train-your-GPT. Every line commented

by mateenah·May 16, 2026·4 points·0 comments
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AI Analysis

●●SolidCozyNiche Gem

Explains attention mechanisms to five-year-olds while building LLaMA 3 from scratch.

Strengths
  • •Every single line of the 7,500+ line codebase is commented with what and why.
  • •Bridges the gap between shallow API tutorials and dense academic papers effectively.
  • •Covers modern specifics like RoPE, RMSNorm, and SwiGLU instead of vanilla Transformers.
Weaknesses
  • •Educational repos are a crowded category with many high-quality existing alternatives.
  • •Learning-only focus means it lacks the production hardening of a real framework.
Category
Education
Target Audience

Python developers wanting to understand Transformer internals without a PhD

Similar To

Andrej Karpathy's nanoGPT · The 'Build a GPT' tutorial series

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