{
  "api_version": "1",
  "updated": "2026-10-19",
  "latest_event": "2026-10-18",
  "rights": "© Frontier Log, all rights reserved.",
  "event": {
    "slug": "2026-06-04-nemotron-3-ultra",
    "date": "2026-06-04",
    "lab": "nvidia",
    "kind": "model",
    "importance": "major",
    "title": "Nemotron 3 Ultra",
    "detail": "Open 550B mixture-of-experts (MoE) model, 55B active, for long-running agents; Nemotron moves to OpenMDW-1.1.",
    "tags": [
      "open-weights"
    ],
    "related": [
      {
        "slug": "2025-12-15-nemotron-3",
        "date": "2025-12-15",
        "lab": "nvidia",
        "title": "Nemotron 3",
        "url": "https://frontierlog.ai/event/2025-12-15-nemotron-3"
      }
    ],
    "source": "https://developer.nvidia.com/blog/nvidia-nemotron-3-ultra-powers-faster-more-efficient-reasoning-for-long-running-agents/",
    "source_title": "NVIDIA Nemotron 3 Ultra Powers Faster, More Efficient Reasoning for Long-Running Agents",
    "source_archived": null,
    "source_http_status": null,
    "followups": [],
    "url": "https://frontierlog.ai/event/2026-06-04-nemotron-3-ultra",
    "image": "https://frontierlog.ai/og/2026-06-04-nemotron-3-ultra.png"
  }
}