**NVIDIA** led open-source AI model releases with **Cosmos 3**, a comprehensive omnimodal world model unifying language, image, video, audio, and action using a Mixture-of-Transformers design, and **Nemotron 3 Ultra**, a **550B** parameter open-weight model noted for high serving speed and strong evaluation performance. The **Cosmos Coalition** was launched to foster an open ecosystem for physical AI world models. Meanwhile, **MiniMax M3** debuted as a multimodal agent/coding model with **1M ...

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