NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it...
In / out price$0.60/$2.40per 1M tokens
Context
262K tokens
Parameters
550BMoE55B active · 22/512 experts per token
Modalities
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Released
Jun 4, 2026
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