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Ethan He, former head of world model at xAI and key contributor to Grok Imagine video generation, announced his departure. He built the multimodal video model from scratch in three months after joining xAI in July 2025.
Google DeepMind researcher Lun Wang leaves the company and writes a post criticizing the current AI evaluation system, arguing that it lags behind model evolution and cannot predict new capabilities, leaving the industry in a state of 'flying blind'.