Bar-by-Bar Feedback: How Dense Rewards Teach AI to Reason
About this episode
In this episode, we unpack why sparse, final-only rewards hobble reinforcement learning in large language models and how dense rewards via a process reward model act like a patient teacher, giving praise for micro-steps along the way. We explore how fortifying these steps reshapes the model’s reasoning, why broad, inconsistent feedback can cause global unlearning, and what this means for building AI that can truly reason across domains.
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