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Nemotron 3 Ultra 550B

NVIDIAπŸ‡ΊπŸ‡Έ US
reasoningtext

NVIDIA's powerful open-weights MoE model: hybrid LatentMoE + MTP layers, 1M context, 550B/55B active. Free on OpenRouter. Focus: complex multi-agent workflows, code, math, science.

At a glance

Context
1M tokens
Parameters
550B MoE (55B active)
Input
text, code

Specifications

Status
Released
Date
June 4, 2026
Lab
NVIDIA
Origin
US
Type
reasoning, text
Open weights
Yes
License
NVIDIA Open Model License
Context
1M tokens
Parameters
550B MoE (55B active)
Input
text, code
Output
text, code

Availability

Direct API accessβœ“ Yes
Open weightsβœ“ Yes