NVIDIA Nemotron 3 Ultra
The first open frontier model built for agents
NVIDIA Nemotron 3 Ultra とは？
NVIDIA's 550B Mixture-of-Experts model with hybrid Mamba-Attention architecture, delivering 300+ tokens/sec with a 1M-token context window. Top-ranked US open-weights model on the Artificial Analysis Intelligence Index. Built specifically for multi-step agent loops where frontier reasoning at open-source economics actually matters. Available now on Hugging Face, OpenRouter, ModelScope, and build.nvidia.com as a NIM microservice.
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