N
Nemotron 3 Ultra
● Excellent8.5
/ 10
NVIDIA Nemotron 3 Ultra is an open frontier-reasoning model with 55B active parameters (550B total) using a hybrid Transformer-Mamba MoE architecture. Supports 1M-token context window for agentic workflows including orchestration, coding, and deep research. Strong multi-step reasoning with high-throughput inference for agent pipelines.
Specifications
| Attribute | Value |
|---|---|
| Lab | NVIDIA |
| Tags | Intelligent |
| Overall Score | 8.5/10 |
| Release Date | 2026-06 |
| Context Window | 1,000,000 tokens |
| Input Price / 1M | $0.50 |
| Output Price / 1M | $2.50 |
| Input Modalities | Text |
| Output Modalities | Text |
Strengths
- 55B active / 550B total MoE with hybrid Transformer-Mamba architecture
- 1M-token context window for long-horizon reasoning and agent orchestration
- Open-weight release on HuggingFace (BF16 weights)
- High-throughput inference optimized for production agent pipelines
- Strong multi-step reasoning and planning capabilities
Weaknesses
- Text-only — no vision, image, or multimodal input support
- Newer entrant with less ecosystem maturity than established labs
Best For
- Agent orchestration and multi-agent pipelines
- Long-horizon reasoning and deep research tasks
- High-volume enterprise agent deployments
- Complex coding with extended context windows
Sources & Further Reading
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