Latent SpaceJun 2, 2026, 11:28 UTC+8

[AINews] NVIDIA Cosmos 3, Nemotron 3 Ultra, and RTX Spark

NVIDIA released Cosmos 3 and Nemotron 3 Ultra; Cosmos 3 uses a Mixture-of-Transformers design with 16B Nano and 64B Super variants, while Nemotron 3 Ultra is described as a 550B-A55B open-weight model.

Why it matters: HKR-H/K/R all pass: NVIDIA ships Cosmos 3, Nemotron 3 Ultra, and RTX Spark with concrete MoT, 16B/64B, and 550B-A55B open-weight details. Impact is broad, but below a frontier-lab model release.

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NVIDIA is moving the open-model fight into physical AI, instead of chasing another chat-model trophy. Cosmos 3 ships 16B Nano and 64B Super variants, using a Mixture-of-Transformers split between an autoregressive reasoner and a diffusion generator. Nemotron 3 Ultra adds a 550B-A55B open-weight LLM on the same news cycle. The target is obvious: make robotics, video, and world-model builders grow up inside the CUDA stack.

The wild part is the packaging: weights, code, datasets, fine-tuning recipes, plus a Cosmos Coalition with names like Runway. Meta used Llama to grab the default enterprise open-model slot; NVIDIA is trying the same play for physical AI. I’d discount the SOTA claims for now: the article says “8+ open leaderboards” and “US SoTA,” but does not lay out the exact evals, reproduction path, or license constraints.

Source: Latent Space · latent.space
Published: Jun 2, 2026, 11:28 UTC+8 · Jun 2, 2026