**Nemotron 3 Ultra Explained**

> NVIDIA&\#x27;s Nemotron 3 Ultra is a 550B open-weight hybrid Mamba-Attention MoE model built for long agentic runs. Here is how its architecture, training, and throughput numbers actually work. Back to blog list Nemotron 3 Ultra Explained: NVIDIA&\#x27;s 550B Hybrid Mamba-MoE Model August 28, 2026 Share Written by Aerin Kim NVIDIA&\#x27;s Nemotron 3 Ultra is a 550B open-weight hybrid Mamba-Attention MoE model built for...

**来源信息**
- **来源**：Hacker News：AI 热帖
- **分类**：论文
- **发布时间**：2026-09-01 20:42（北京时间）
- **原文**：[打开原文](https://miraflow.ai/blog/nemotron-3-ultra-explained-nvidia-hybrid-mamba-moe-2026)