Fei-Fei Li's World Labs ships Marble 3D scene generator; Yann LeCun leaves Meta to launch rival world-model startup; DeepMind releases Genie 3—same term, three divergent AI approaches to spatial intelligence

Why Fei-Fei Li and Yann LeCun Are Both Betting on “World Models” — and How Their Bets Differ

AI has finally reached the “we need to model the whole world” phase. In the same season, Fei-Fei Li’s World Labs shipped Marble, a “multimodal world model” that turns prompts into walkable 3D scenes in your browser, and reports emerged that Meta’s chief AI scientist Yann LeCun is leaving to build a world-model startup of his own. DeepMind, meanwhile, is calling its new interactive video engine Genie 3 a world model as well. Same phrase. Three very different bets. The week “world models” went mai...