Hang Gao

I am a member of technical staff at xAI, working on multimodal generative models.

I did my PhD at UC Berkeley advised by Angjoo Kanazawa. Before that, I studied at Jiao Tong University and Columbia.

Past projects selected → all

	Grok Imagine 0.9 Imagine team at xAI, worked on post-training, data and eval Product Release, 2025 We made and rolled out Grok's first generation of video models in 3 months from scratch.
	Stable Virtual Camera: Generative View Synthesis with Diffusion Models Jensen (Jinghao) Zhou, Hang Gao, Vikram Voleti, Aaryaman Vasishta, Chun-Han Yao, Mark Boss, Philip Torr, Christrian Rupprecht, Varun Jampani ICCV, 2025 project page / arXiv / code We build a multi-view diffusion model for view synthesis from as few as a single image.
	SOAR: Self-Occluded Avatar Recovery from a Single Video Zhuoyang Pan, Angjoo Kanazawa, Hang Gao arXiv, 2024 project page / arXiv / code We recover complete human avatars from self-occluded videos in the wild.
	Shape of Motion: 4D Reconstruction from a Single Video Qianqian Wang, Vickie Ye, Hang Gao, Jake Austin, Zhengqi Li, Angjoo Kanazawa ICCV, 2025 (Spotlight)* project page / arXiv / code We propose a method for joint 4D reconstruction and 3D tracking on internet footages.
	NerfAcc: Efficient Sampling Accelerates NeRFs Ruilong Li, Hang Gao, Matthew Tancik, Angjoo Kanazawa ICCV, 2023 project page / arXiv / code We build and release a toolbox for accelerating all kinds of NeRFs by efficient sampling.
	Monocular Dynamic View Synthesis: A Reality Check Hang Gao, Ruilong Li, Shubham Tulsiani, Bryan Russell, Angjoo Kanazawa NeurIPS, 2022 project page / arXiv / code We systematically show why and how existing 4D reconstruction methods don't work well in the wild.
	Long-term Human Motion Prediction with Scene Context Zhe Cao, Hang Gao, Karttikeya Mangalam, Qi-Zhi Cai, Minh Vo, Jitendra Malik ECCV, 2020 (Oral Presentation) project page / arXiv / code We predict long-term, diverse human motion in 3D by understanding scene context from an image.
	Deformable Kernels: Adapting Effective Receptive Fields for Object Deformation Hang Gao, Xizhou Zhu, Steve Lin, Jifeng Dai ICLR, 2020 project page / arXiv / code We propose a new convolutional operator that does attention in the kernel space.
	Spatio-Temporal Action Graph Networks Roei Herzig, Elad Levi, Huijuan Xu, Hang Gao, Eli Brosh, Xiaolong Wang, Amir Globerson, Trevor Darrell ICCV Workshop*, 2019 arXiv We find relational graph useful for action recognition.
	Disentangling Propagation and Generation for Video Prediction Hang Gao, Huazhe Xu, Qi-Zhi Cai, Ruth Wang, Fisher Yu, Trevor Darrell ICCV*, 2019 arXiv We make a system that propagates seen parts and generates unseen ones.
	Low-shot Learning via Covariance-Preserving Adversarial Augmentation Networks Hang Gao, Zheng Shou, Alireza Zareian, Hanwang Zhang, Shih-Fu Chang NeurIPS, 2018 arXiv We learn feature augmentation for low-shot classifiers.
	AutoLoc: Weakly-supervised Temporal Action Localization in Untrimmed Videos Zheng Shou, Hang Gao, Lei Zhang, Kazuyuki Miyazawa, Shih-Fu Chang ECCV, 2018 arXiv / code We propose a weakly-supervised method for temporal action localization.
	ER: Early Recognition of Inattentive Driving Events Leveraging Audio Devices on Smartphones Xiangyu Xu, Hang Gao, Jiadi Yu, Yingying Chen, Yanmin Zhu, Guangtao Xue, Minglu Li INFOCOM, 2017 IEEE We build an audio-based mobile app for inattentive driving detection.

Thanks Jon!
Last updated October 2025.