A developer and educator going by rasbt just dropped the definitive open source guide to building a GPT style language model from zero, and the project is the cleanest pedagogical resource on transformers available anywhere in 2026. The repository is called LLMs-from-scratch, and the entire premise is that you learn how an LLM works by building one yourself with pure PyTorch. No external...
LLMs-from-Scratch: Build a GPT Model With Pure PyTorch, No Black Boxes
L
