Unverified50% confidenceFactExact time
PPO estimates the value of each intermediate state by training a critic network, thereby supporting finer-grained credit assignment.
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10/28/2026
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UnverifiedStandard PPO requires training an additional value network (critic) of the same scale as the policy model to estimate the baseline, whereas the cost of GRPO is that multiple samples are needed per prompt, increasing sampling cost.78% similarVerifiedPPO（近端策略优化）通过限制每次参数更新的幅度，在学习效率与训练稳定性之间取得平衡75% similarVerifiedThis project uses the PPO algorithm for reinforcement learning training.73% similarVerifiedCompared to PPO, GRPO eliminates the value network (Critic) and directly compares rewards among samples within a group to estimate the advantage function, significantly reducing training computation costs.72% similarUnverifiedIf Score Centering is experimentally validated as effective, it will provide support for off-policy LLM training approaches that go beyond the PPO paradigm.71% similar
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