Nemotron 3 Ultra (free)
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
Models
Nemotron 3 Ultra (free)
Added 10 July 2026
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:freeDocs
OpenRouter id: nvidia/nemotron-3-ultra-550b-a55b:free
Benchmarks
- Intelligence Index (artificial-analysis): 22.9 index
- Coding Index (artificial-analysis): 49.3 index
- Agentic Index (artificial-analysis): 20.1 index
- Design Arena 3d (other): 1133 elo · #75
- Design Arena asciiart (other): 1098 elo · #60
- Design Arena codecategories (other): 1148 elo · #85
- Design Arena dataviz (other): 1142 elo · #84
Notes
Nemotron 3 Ultra (free) is listed in the EDNA Models directory from the OpenRouter catalogue.
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