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Wei-Wen Xu

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#artificial intelligence Preprint Sep 2026

Pistis Technical Report

We introduce the Pistis model family, comprising 27B- and 9B-parameter multimodal large language models built on Qwen3.6 and Qwen3.5, respectively, and developed through a general and scalable post-training framework. The framework first establishes a strong foundation through large-scale multimodal supervised fine-tun...

Heyu Chen, Xiao-Han Lan, Jia-Xin Li et al. · 0 citations
Conference Open access 2026

MMAC: A Multilingual, Multimodal Alignment Framework for Cultural Grounding Evaluation

The causes of modal divergence are probed, offering insights into fostering culturally robust MLLMs, and a Multilingual, Multimodal Alignment framework for Cultural grounding evaluation is proposed.

Weihua Zheng, Zhengyuan Liu, Tanmoy Chakraborty et al. · 0 citations
#small language model Preprint Aug 2026

Video-OPSD: Exploiting Privileged Visual Evidence for On-Policy Self-Distillation in Video Large Language Models

Experiments across video understanding and reasoning benchmarks show that the Evidence-Grounded Self-Teacher framework consistently improves upon Standard OPSD across multiple backbones and achieves performance comparable to GRPO while requiring substantially less training time, establishing an effective and efficient...

Zi-Yue Wang, Shiqi Huang, Wei-Wen Xu et al. · 0 citations

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