most citedContext Length Alone Hurts LLM Performance Despite Perfect Retrieval

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cs.LG2026

Sparrow: Sparse Rollout for Stable and Efficient Long-context RL of Large Language Models

Yang Zhou, Ranajoy Sadhukhan, Zhaofeng Sun +7

Despite being powerful, reinforcement learning with verifiable rewards (RLVR) induces extremely long COT, making it computationally expensive. Since RLVR per-step cost is dominated…