How LLMs Work, Part 3: From Toy Model to GPT In Part 1 I covered how text gets tokenized, embedded, and processed through the transformer architecture. In Part 2 I went through backpropagation, gradient descent, and the Adam optimizer. But there is a massive gap between a toy model that trains in seconds on a laptop and models like Llama 3 that train on thousands of GPUs for weeks. In this article…