DESCRIPTION:

This tutorial is aimed at coders interested in understanding the building blocks of large language models (LLMs), how LLMs work, and how to code them from the ground up in PyTorch. We will kick off this tutorial with an introduction to LLMs, recent milestones, and their use cases. Then, we will code a small GPT-like LLM, including its data input pipeline, core architecture components, and pretraining code ourselves. After understanding how everything fits together and how to pretrain an LLM, we will learn how to load pretrained weights and finetune LLMs using open-source libraries.

OUTLINE:

0:00 – Workshop overview

2:17 – Part 1: Intro to LLMs

9:14 – Workshop materials

10:48 – Part 2: Understanding LLM input data

23:25 – A simple tokenizer class

41:03 – Part 3: Coding an LLM architecture

45:01 – GPT-2 and Llama 2

1:07:11 – Part 4: Pretraining

1:29:37 – Part 5.1: Loading pretrained weights

1:45:12 – Part 5.2: Pretrained weights via LitGPT

1:53:09 – Part 6.1: Instruction finetuning

2:08:21 – Part 6.2: Instruction finetuning via LitGPT

02:26:45 – Part 6.3: Benchmark evaluation

02:36:55 – Part 6.4: Evaluating conversational performance

02:42:40 – Conclusion

REFERENCES:

1. Build an LLM from Scratch book: https://mng.bz/M96o 

2. Build an LLM from Scratch repo: https://github.com/rasbt/LLMs-from-sc... 

3. GitHub repository with workshop code: https://github.com/rasbt/LLM-workshop... 

4. Lightning Studio for this workshop: https://lightning.ai/lightning-ai/stu... 

5. LitGPT: https://github.com/Lightning-AI/litgpt