GRPO with Verifiable (Binary) Rewards Is an Adaptive Weighted Contrastive Loss

1. Grouped Reward Policy Optimization The goal of this short blog is to understand GRPO that was used successfully to train Deepseek models. We will limit our analysis to binary rewards or what Tulu authors calls RLVR (Reinforcement learning with Verifiable Rewards.) Understanding GRPO with Rule Based (Binary) Reward GRPO has been successfully used in DeepSeek (v3,math, and R1) especially with…