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Zhi-Qiang Tao

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#artificial intelligence Preprint Sep 2026

On the Token Value Inequality in Efficient Reasoning

This work presents a diagnostic and optimization framework grounded in a key empirical finding: the value of tokens within a CoT reasoning sequence is highly non-uniform, and this non-uniformity can be effectively characterized by token-level log probability signals.

Run-Jia Zeng, Hang Hua, Yiyang Liu et al. · 0 citations
Preprint Aug 2026

HindSearch: Trajectory-Level Hindsight Critique for Search-Augmented Reinforcement Learning

HindSearch is introduced, a hindsight self-distillation procedure for GRPO: after each rollout, a frozen judge writes a short critique of every failed trajectory using the gold answer, and the critique supplies an auxiliary on-policy distillation signal on the student's search actions.

Hao-Wei Liu, Jiamian Wang, Hsin-Tai Wu et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Spurious Advantage Hidden in GRPO

SignBALANCE is proposed, whose magnitude is composition-free: it keeps the verifier sign, uses a global scale, and restores zero-mean balance via a stop-gradient per-class rescaling.

Jiamian Wang, Samyadeep Basu, Koustava Goswami et al. · 0 citations

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