Building Large Language Models From Scratch: A Hands-On Journey Through GPT Architecture Introduction Have you ever wondered how ChatGPT and similar AI systems actually work under the hood? While most tutorials teach you to use existing APIs, “Build a Large Language Model (From Scratch)” takes a radically different approach. This comprehensive guide walks you through creating a GPT-like language model line-by-line, giving you fundamental insights that pre-packaged solutions can’t provide. Based on the official repository for Sebastian Raschka’s book, this article explores how anyone can understand LLM mechanics by building them from the ground up. What You’ll Actually Build Through …