Last refreshed 2026-10-17. Next refresh: weekly.
Why use Nemotron 3 Ultra on Together AI?
Together AI offers Nemotron 3 Ultra with competitive pricing. Together AI is a platform for running open-source and proprietary LLMs with fast serverless and dedicated endpoints at competitive inference pricing.
Compare Nemotron 3 Ultra across 8 providers to find the best fit for your use caseInput / 1M
-
Output / 1M
-
Cache
Not sourced
Batch
Not sourced
Setup recipe
Python + curlInstall
pip install togetherAuth
export TOGETHER_API_KEY=...Call
from together import Together
client = Together() # reads TOGETHER_API_KEY from env
response = client.chat.completions.create(
model="nvidia/nemotron-3-ultra-550b-a55b",Model ID
nvidia/nemotron-3-ultra-550b-a55bRequest example
from together import Together
client = Together() # reads TOGETHER_API_KEY from env
response = client.chat.completions.create(
model="nvidia/nemotron-3-ultra-550b-a55b",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use provider model ID "nvidia/nemotron-3-ultra-550b-a55b", not the LLMReference slug "nemotron-3-ultra".
- Together uses "organization/model-name" format, e.g. "meta-llama/Llama-4-Scout-17B-16E-Instruct" or "Qwen/QwQ-32B". See the Together model catalog for the exact ID.
- The examples expect TOGETHER_API_KEY; rename it only if your application config maps the new variable.
Compare Nemotron 3 Ultra Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| OpenRouter | — | — |
| DeepInfra | $0.50 | $2.20 |
| Baseten API | $0.60 | $2.40 |
| Venice AI | $0.63 | $3.13 |
| Fireworks AI | $0.60 | $2.40 |
Capabilities
ReasoningJSON / Tool use
About Nemotron 3 Ultra
NVIDIA's open frontier-reasoning model (550B total / 55B active MoE, hybrid Transformer-Mamba). Highest Artificial Analysis Intelligence Index for any US open model (score: 48). 300+ tokens/second. 1M-token context. Announced at Computex 2026. Pricing: ~$0.60/$2.60 per 1M tokens (provider median); free tier on some providers.
Get Started
Model Specs
Released2026-06-04
Parameters550B
Context1M
ArchitectureMixture of Experts