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NVIDIA: Nemotron 3 Ultra (free)

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...

Text
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Specification
Model ID
nvidia/nemotron-3-ultra-550b-a55b:free
Weight license
Not verified; consult the exact publisher model card
Modality
Text >text
Context
1M tokens
Input
$0/1M
Output
$0/1M
Updated
Sep 27, 2026
Scores
Capabilities
  • Supports tool calling
  • No vision support listed
  • Supports long-context workflows
  • Supports deeper reasoning tasks

Input and output

Accepts Text inputs. Returns Text outputs.

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortseedtemperaturetool_choicetoolstop_p

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