Nat Lambert Completes RLHF Book with 10+ Hour Course

AI researcher Nat Lambert announced the completion of his book, Reinforcement Learning from Human Feedback, with links available on the official website, Amazon, and Manning. Aimed at beginners but grounded in practical experience, the book serves as a valuable resource for those interested in model fine-tuning, alignment, and post-training.

Confirmed

• Background: Lambert described the book as the resource he wished he had when learning about fine-tuning, alignment, and post-training following the advent of ChatGPT. He wrote it intermittently over evenings and weekends, taking nearly two years from 2024 to the present.
• Accompanying Materials: Alongside the main text, Lambert included comprehensive learning materials, featuring a 10+ hour course and relevant training code.
• Practical Focus: Drawing from his experience with OLMo, the book goes beyond conceptual introductions to emphasize actionable training and post-training practices.

2026-07-21 ~ 2026-07-23 · 11 related posts

• [source] Nat Lambert finishes an RLHF book with a 10-hour course and training code — natolambert · 2026-07-21
• [source] Natolambert finishes a new RLHF book built from his Olmo training experience — natolambert · 2026-07-21
• RLHF book finished after nights and weekends of work since 2024 — vjkaruna · 2026-07-22
• OLMo author says their RLHF book is finished after nights and weekends since 2024 — giffmana · 2026-07-23

7 near-duplicate retellings: dejavucoder · TheZachMueller · deliprao · Jeande_d · HamelHusain · alexisjross · danielhanchen