NVIDIA Nemotron 3 Ultra
NVIDIA · released Jun 4, 2026
| size | 550 B total, 55 B active |
| context window | 1,000,000 tokens |
| longest response | not stated by the maker |
| knowledge cutoff | September 2025 |
| open weights | yes, license: OpenMDW 1.1 |
| price on OpenRouter | $0.60 per million input tokens, $2.40 per million output tokens |
| input and output | text in, text out |
Manufacturer data (model page, model card) and OpenRouter, verified Sep 25, 2026.
Where we tested it
The silence test
TaskThe model had to stay quiet for a moment; the correct reply had zero characters.
It did not stay silent in any of its six tries; the closest it came was three dots. Asked to reply by not replying, it wrote 467 characters in Czech about how that is a paradox.
Dragon
TaskThe model's task was to draw a picture of a dragon as an SVG.
15 points out of 50. Instead of answering, it sent made-up command line calls to folders on a disk it doesn't have.
You'll find the size band and figures for other models on the Tested models page.