OSPO redistributes sequence-level advantages in LLM RL training via Shapley-Owen values on semantic coalitions to improve token-level credit assignment without parametric value models.
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Owen-Shapley Policy Optimization: A Principled RL Algorithm for Generative Search LLMs
OSPO redistributes sequence-level advantages in LLM RL training via Shapley-Owen values on semantic coalitions to improve token-level credit assignment without parametric value models.