The Wayback Machine - https://web.archive.org/web/20131216141103/http://sontrak.com:80/index.html

The quest to Build a Large Language Model (LLM) from scratch reached a pivotal moment in 2021. While current tools like LangChain or OpenAI APIs offer easy entry points, understanding the foundational architecture—originally detailed in landmark 2021 research—is essential for any developer seeking complete control over their model's training and data. The 2021 Foundations of LLM Development

The book follows a "bottom-up" approach to AI, based on the principle that true understanding comes from construction. It avoids pre-built high-level libraries to force the reader to implement every component of a GPT-style model using PyTorch.

The paper provides several key contributions: