Housekeeping: No voiceover on another quick “launch” post. More essays soon! After a few long years of finding time to document my lessons from training open models, my post-training book is done! It’s published by Manning, under the title Reinforcement Learning from Human Feedback: Aligning and Post-training LLMs. Telling the story of the book is a useful way to explain why you may want a copy. The book started as a website where I wanted to document key methods of post-training that had potentially no online material explaining them. If there was something, I couldn’t find it. This existed f