Jeremy Howard
A Hackers' Guide to Language Models
Jeremy Howard's code first tour of language models for people who want to build with them today. It starts with what a language model is and the three stage recipe he helped popularize with ULMFiT, moves to using the strongest hosted models well, then to the practical engineering: the API and function calling, running open models locally with quantization, retrieval augmented generation, and fine tuning a small model on a narrow task. The through line is that you learn this by running notebooks, not by reading about it.