RLHF: Reward Model + PPO
SFT teaches the model to follow instructions. But it doesn't teach the model which response is BETTER. Two grammatically correct, factually accurate answers can differ enormously in helpfulness. RLHF is how you encode human judgment into the model's behavior. It's what makes Claude helpful and GPT polite.
Visual edition planned
This lesson isn’t interactive yet.
It is part of the curriculum and will get the same treatment as Phase 1 — a visual cover, hands-on labs, derivations with numeric checks and a quiz. Until then, the original lesson is the best place to read it:
Part of Phase 10 — LLMs from Scratch. Use the previous / next cards below to keep browsing the phase.