NVIDIA: Nemotron 3 Ultra (free)
nvidia/nemotron-3-ultra-550b-a55b:free · agent · 1M ctx · added 2026-06-04
556.14B/d
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...
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openrouter/nvidia/nemotron-3-ultra-550b-a55b:free
556.14B/d
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5mo
sticker
life
429
tok/d
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age
hf/nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16
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$1.0000·5.0000
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5mo