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Kai-Chen Zhang

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#artificial intelligence Preprint Sep 2026

GVPO++: Group Variance Policy Optimization for LLM Post-Training and On-Policy Distillation

Group Variance Policy Optimization is introduced, a novel post-training method that integrates the analytical solution of KL-constrained reward maximization into its gradient weighting scheme and establishes a new paradigm for reliable and versatile LLM post-training and on-policy distillation.

Kai-Chen Zhang, Yuzhong Hong, Jun-Wei Bao et al. · 0 citations
Jul 2026

Mage-VL: An Efficient Codec-Native Streaming Multimodal Foundation Model

Mage-VL is presented, an efficient codec-native streaming foundation model for real-time multimodal understanding and interaction and establishes AI4AI data pipelines encompassing prompt-code joint optimization for multimodal captioning and AI-driven performance diagnosis to guide training recipes.

Senqiao Yang, Kaichen Zhang, Zhaoyang Jia et al. · 3 citations
Preprint Aug 2026

Stream Forcing: Constructing Unified Training Trajectory for Robust Streaming Video Generation

This work reformulates the video diffusion sampling as a frame-indexed stochastic process over noise levels, and constructs a continuous training trajectory along which the sampling schedule progressively evolves from independent sampling to inference-consistent sampling.

Yue-Ting Zhu, Yue-Hao Song, Kai-Chen Zhang et al. · 2 citations

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