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The algorithm that trains reasoning LLMs can't teach a robot to walk

Follow-up to an earlier write-up on the REINFORCE → PPO → GRPO lineage. That one ended with GRPO as "PPO minus the critic, plus a group-mean baseline", which raises an obvious question: if it's cheaper and good enough for DeepSeek's reasoning models, why does nobody use it for control? Two reasons,…

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  1. 2026-10-14 07:31 · r/reinforcementlearning
    The algorithm that trains reasoning LLMs can't teach a robot to walk

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