NVIDIA: Nemotron 3 Ultra (free) reasoning

openrouter
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...

Capabilities

Context Window 1M tokens
Max Output 65k tokens
Inputs
Outputs

Pricing (per 1M tokens)

Input $-
Output $-
Cache Read -
Cache Write -

Supported Parameters

include_reasoningmax_tokensreasoningseedtemperaturetool_choicetoolstop_p

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