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Nemotron 3 Ultra 550B A55B

nvidia/nemotron-3-ultra-550b-a55b

NVIDIA / Nemotron

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Largest Nemotron 3 model for maximum open-weight reasoning and agent accuracy

Released
2026-06-04
Context window
1M
Max output
128K
Weights
Open weight
Modalities
TextInputTextOutput
Capabilities
ReasoningTool callTemperatureOpen weight
Providers
KenariKilo GatewayNanoGPTNvidiaOpenRouterTogether AIUnoRouterVercel AI Gateway

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