7,500-line interactive textbook teaches building LLMs from scratch
tom_doerr · x · 2026-08-23
GitHub user raiyanyahya released 'How to Train Your GPT,' a 12-chapter interactive textbook with over 7,500 lines of fully annotated Python code.
Designed to explain building, training, and running modern language models (like ChatGPT, Claude, LLaMA architectures) from absolute scratch, the project includes 28 standalone topic explainers covering key techniques in depth, such as RoPE, Attention, RMSNorm, SwiGLU, KV cache, AdamW, and mixed precision.
Repo: https://github.com/raiyanyahya/how-to-train-your-gpt
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