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English(EN) GRPO doesn't remove the reward model. It removes the critic.

GRPO 算法变体阐明其在强化学习微调中的作用

Shao 及其同事推出的 GRPO 算法是近端策略优化 (PPO) 的一种变体,它通过移除计算成本高昂的评论员网络来修改训练过程。GRPO 使用奖励模型为给定问题的多个采样输��打分,并根据组平均值计算优势,而不是使用评论员。这种方法以增加生成时间为代价,换取了内存和计算负担的减少。值得注意的是,GRPO 并不消除奖励模型本身,也不放弃 KL 正则化,而是将其重新定位在损失函数中。 AI

影响 阐明 GRPO 增强了现有能力,而不是创造新能力,从而影响了对强化学习微调的理解。

排序理由 该条目基于一篇研究论文,详细介绍了特定的算法变体 (GRPO) 及其与先前算法 (PPO) 相比的技术修改。[lever_c_demoted from research: ic=1 ai=1.0]

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GRPO 算法变体阐明其在强化学习微调中的作用

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该条目基于一篇研究论文,详细介绍了特定的算法变体 (GRPO) 及其与先前算法 (PPO) 相比的技术修改。[lever_c_demoted from research: ic=1 ai=1.0]
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  1. dev.to — LLM tag TIER_1 English(EN) · Arun Kumar ·

    GRPO 不移除奖励模型,它移除的是评论员。

    <p>Every time GRPO comes up I see the same slip — someone says it "gets rid of the reward model". It doesn't. It gets rid of the <em>value</em> model. Those are two different networks doing unrelated jobs, and telling them apart is most of understanding the algorithm.</p> <p>Wort…