Published on February 15, 2026, chapter 7 of Reasoning From Scratch presents a GRPO implementation that adds and examines bounded policy ratios, a KL term, format rewards, and other improvements.
Published on February 15, 2026, chapter 7 of Reasoning From Scratch presents a PyTorch notebook about improvements to a GRPO implementation. It examines bounded policy ratios, a KL term, format rewards, and other changes, with a step-by-step approach for engineers studying reasoning models.
To check the material, consult the original chapter and notebook. Inspect which changes the implementation applies and compare the chapter's explanations with the code; the available description reports no quantitative results and does not claim that any specific improvement outperforms the others.