Hexiang Hu is a Member of Technical Staff at SpaceXAI, where he works on multi-modal pre-training and native image generation for Grok. Previously he was a Research Scientist at Google DeepMind and a core contributor to Gemini and Imagen 3. He earned his Ph.D. in Computer Science from the University of Southern California (USC), advised by Prof. Fei Sha. His work centers on multi-modal foundation models — pre-training, understanding, and generation. [ CV ]