NVIDIA
Nemotron 3 Ultra
nvidia/nemotron-3-ultra-550b-a55b
Open reasoning model for orchestrating other agents. Text only.
TextText → TextReady on endue
- Reasoning
- Agentic work
- Open weights
Overview
Good for
Written by endue
- Reasoning
- Agentic work
- Open weights
Not ideal for
From the model’s specs
- Text input only. Images and files you attach are skipped.
Capabilities
| Tool use | Supported |
|---|---|
| Structured output | Supported |
| JSON mode | Supported |
| Reasoning | Supported |
| Vision | Not supported |
| Audio input | Not supported |
| Video input | Not supported |
| File input | Not supported |
| Long context | Supported |
Specifications
- Model ID
nvidia/nemotron-3-ultra-550b-a55b- Family
- Nemotron 3
- Context window
- 262K tokens
- Input
- Text
- Output
- Text
- Released
- 2026-06-04