Nat Lambert finishes an RLHF book with a 10-hour course and training code
natolambert · x · 2026-07-21
Nat Lambert says his book on Reinforcement Learning from Human Feedback is finished.
- He wrote it to be the guide he wished he had while learning to fine-tune, align, and post-train models after ChatGPT.
- The release includes a 10+ hour full course, slide decks, working code for the training chapters, and an example model completions library.
- A free web version is available, while printed copies from Manning should ship in 1–2 weeks and Amazon copies a bit later.
- He says the book distills lessons learned while building Olmo, and was written nights and weekends since 2024.
Related event: Nat Lambert Completes RLHF Book with 10+ Hour Course(11 posts)→
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