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Build a Large Language Model (From Scratch)

This repository contains the code for coding, pretraining, and finetuning a GPT-like LLM and is the official code repository for the book Build a Large Language Model (From Scratch).

(If you downloaded the code bundle from the Manning website, please consider visiting the official code repository on GitHub at https://github.com/rasbt/LLMs-from-scratch.)



In Build a Large Language Model (from Scratch), you'll discover how LLMs work from the inside out. In this book, I'll guide you step by step through creating your own LLM, explaining each stage with clear text, diagrams, and examples.

The method described in this book for training and developing your own small-but-functional model for educational purposes mirrors the approach used in creating large-scale foundational models such as those behind ChatGPT.



Table of Contents

Please note that the Readme.md file is a Markdown (.md) file. If you have downloaded this code bundle from the Manning website and are viewing it on your local computer, I recommend using a Markdown editor or previewer for proper viewing. If you haven't installed a Markdown editor yet, MarkText is a good free option.

Alternatively, you can view this and other files on GitHub at https://github.com/rasbt/LLMs-from-scratch.



Chapter Title Main Code (for quick access) All Code + Supplementary
Ch 1: Understanding Large Language Models No code No code
Ch 2: Working with Text Data - ch02.ipynb
- dataloader.ipynb (summary)
- exercise-solutions.ipynb
./ch02
Ch 3: Coding Attention Mechanisms - ch03.ipynb
- multihead-attention.ipynb (summary)
- exercise-solutions.ipynb
./ch03
Ch 4: Implementing a GPT Model from Scratch - ch04.ipynb
- gpt.py (summary)
- exercise-solutions.ipynb
./ch04
Ch 5: Pretraining on Unlabeled Data Q1 2024 ...
Ch 6: Finetuning for Text Classification Q2 2024 ...
Ch 7: Finetuning with Human Feedback Q2 2024 ...
Ch 8: Using Large Language Models in Practice Q2/3 2024 ...
Appendix A: Introduction to PyTorch* - code-part1.ipynb
- code-part2.ipynb
- DDP-script.py
- exercise-solutions.ipynb
./appendix-A

Tip

Please see this and this folder if you need more guidance on installing Python and Python packages.)



Shown below is a mental model summarizing the contents covered in this book.

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Implementing a ChatGPT-like LLM from scratch, step by step

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