← All models
NVIDIA
Nemotron 3 Ultra
Live · US + CAtextOpenMDW-1.1
NVIDIA's largest Nemotron 3: a hybrid Mamba-Transformer MoE tuned for agents and tool calling.
Price per 1M tokens
Input
$0.60
Cached input
$0.12
Output
$2.40
Priced per model · Same in US and CA · Free tier included · Pricing
AA Index
23
#12 of 14
open models we serve
Specs
- Model id
nemotron-3-ultra-550b-a55b- Weights released
- Jun 4, 2026
- Parameters
- 550B total · 55B active
- Architecture
- MoE
- Context
- —
- Input
- text
- License
- OpenMDW-1.1
- Regions
- us, ca
Benchmarks
- Artificial Analysis Intelligence Index23
- GPQA Diamond86.7%
- AIME 202582.71%
Sources: huggingface.co · research.nvidia.com · artificialanalysis.ai
Use it
Three lines of code, or zero.
OpenAI-compatible. Use the model id below, or auto to let the router decide when this model is worth it.
import os
from openai import OpenAI
client = OpenAI(base_url=os.environ["ST_BASE_URL"], api_key=os.environ["ST_API_KEY"])
resp = client.chat.completions.create(
model="nemotron-3-ultra-550b-a55b",
messages=[{"role": "user", "content": "Hello"}],
)Similar models