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How GRPO’s Relative Rewards Work
Artificial Intelligence

How GRPO’s Relative Rewards Work

Group Relative Policy Optimization (GRPO) calculates a relative "advantage" for an output by comparing its reward to the average reward of other outputs generated for the same prompt. This group-based baseline eliminates the need for a separate value function (critic model), making the training of Large Language Models more memory-efficient and stable.

Nov 3, 2025 3 min read Hasib Ahmed