Nemotron 3 Ultra
Nemotron 3 Ultra is an open-weight NVIDIA language-model release. The largest released Nemotron 3 tier targets difficult reasoning, software engineering, and long-running tool workflows. Latent mixture-of-experts routing and multi-token prediction support efficient frontier-scale training and serving. Downloadable base and post-trained weights are available in several precisions. The license permits commercial and non-commercial use subject to its published terms.
2026-06-04
550B total, 55B active
Hybrid Mamba-2 / Transformer mixture-of-experts with latent experts and multi-token prediction
OpenMDW-1.1
Specifications
- Parameters
- 550B total, 55B active
- Architecture
- Hybrid Mamba-2 / Transformer mixture-of-experts with latent experts and multi-token prediction
- License
- OpenMDW-1.1
- Context Window
- 1,048,576 tokens
- Type
- text
- Modalities
- text
Benchmark Scores
Advanced Specifications
- Model Family
- Nemotron
- API Access
- Available
- Chat Interface
- Not Available
Capabilities & Limitations
- Capabilities
- reasoningcoding
- Known Limitations
- Requires large multi-GPU deployment; reported results can depend on tools and inference budgetOutputs may be incorrect despite reasoning traces
- Notable Use Cases
- model researchself-hosted reasoningspecialist data generation