{"type": "article", "title": "NVIDIA AI Releases Nemotron 3 Ultra: An Open 550B Mixture-of-Experts Hybrid Mamba-Transformer for Long-Running Agents", "publisher": "Web Pulse", "url": "https://wpnews.pro/news/nvidia-ai-releases-nemotron-3-ultra-an-open-550b-mixture-of-experts-hybrid-mamba", "original_source": "https://www.marktechpost.com/2026/06/04/nvidia-ai-releases-nemotron-3-ultra-an-open-550b-mixture-of-experts-hybrid-mamba-transformer-for-long-running-agents/", "published": "2026-06-04T21:42:28+00:00", "accessed": "2026-06-04", "id": "nvidia-ai-releases-nemotron-3-ultra-an-open-550b-mixture-of-experts-hybrid-mamba"}