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Training & Fine-tuningMedium· Reinforcement Learning· GRPO· PPO
How does GRPO differ from PPO, and when would you choos...
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See plansGRPO is advantageous when memory is a binding constraint or when a value function initialization is unavailable. PPO remains preferable when a mature critic is available and when the task requires more precise variance reduction, as the group-mean baseline in GRPO may be insufficiently accurate for long-horizon tasks.