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Qibin Hou

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#artificial intelligence Preprint Sep 2026

Dr. Free: You Don't Need Difficulty Rewards for Self-Evolving Search Agents

This paper introduces \methodname, the first self-evolving search framework that eliminates difficulty-based proposer rewards and directly optimizes for evidence necessity relative to shortcut contexts, and shows that Dr. Free outperforms prior data-free search agents and the supervised baseline.

Zhi-Peng Qian, Zi-Han Liang, Yu-Fei Ma et al. · 0 citations
Jul 2026

RecoReward: Recommender-Guided Multimodal Description Generation for Recommendation

These results show that RecoReward trains the MLLM to produce item features that benefit downstream recommendation while retaining content-only serving, and shows that RecoReward-9B outperforms its Qwen3.5-9B baseline and all other evaluated models across seven recall metrics.

Guohong Mu, Yue-Yang Liu, Jiangxia Cao et al. · 0 citations
Preprint Aug 2026

Annotations as Rollouts: Efficient and Scalable Reinforcement Learning for Video MLLMs

The sample efficiency and scalability of RL post-training for video MLLMs and introduces OraRL, a decoupled advantage estimator that scales with model size and data, surpassing its backbone from 0.8B to 9B and GRPO up to 100k prompts.

Yun-Heng Li, Guo-Hong Mu, Hao Li et al. · 1 citation

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