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Nemotron 3 Ultra (free)

Name: Nemotron 3 Ultra (free)
Author: NVIDIA

by NVIDIA

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 m

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Models

Nemotron 3 Ultra (free)

Added 10 July 2026

#nvidia

Overview

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...

How to use / API access

Call via OpenRouter with model id `nvidia/nemotron-3-ultra-550b-a55b:free`.

openrouter · nvidia/nemotron-3-ultra-550b-a55b:free Docs

OpenRouter id: nvidia/nemotron-3-ultra-550b-a55b:free

Benchmarks

Intelligence Index (artificial-analysis) : 37.8 index
Coding Index (artificial-analysis) : 49.3 index
Agentic Index (artificial-analysis) : 27.4 index
Design Arena 3d (other) : 1213 elo · #42
Design Arena asciiart (other) : 1117 elo · #44
Design Arena codecategories (other) : 1166 elo · #62
Design Arena dataviz (other) : 1150 elo · #65

Notes

Nemotron 3 Ultra (free) is listed in the EDNA Models directory from the OpenRouter catalogue.

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