Nemotron 3 Ultra 550B · NVIDIA
NVIDIA Nemotron 3 Ultra is a frontier reasoning and orchestration model: 550B total parameters (55B active) on a hybrid Transformer-Mamba MoE architecture. Exceptional reasoning quality with a 1M-token context.
About Nemotron 3 Ultra 550B
NVIDIA Nemotron 3 Ultra is a frontier reasoning and orchestration model: 550B total parameters (55B active) on a hybrid Transformer-Mamba MoE architecture. Exceptional reasoning quality with a 1M-token context.
Where it shines: 550B parameters (largest free) · Frontier reasoning · 1M-token context.
How to use Nemotron 3 Ultra 550B
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Type or upload
Type what you want in the box above — or upload the file if the tool asks for one.
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Generate
Click the main button. Wait 2-30 seconds depending on the model and input size.
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Download or share
Download the result or share the direct link. No watermark, ready to use.
Frequently asked questions
How much does it cost to use Nemotron 3 Ultra 550B?
Nemotron 3 Ultra 550B is one of the free models in the catalog. Each use discounts 10 tokens from your pool, but open models like Nemotron 3 Ultra 550B don’t cost us, so the rate-limit is generous. A free account comes with 500 initial tokens and 25 more every day — you usually don’t get to touch the card.
Is there a usage limit for Nemotron 3 Ultra 550B?
There is no fixed monthly fee for Nemotron 3 Ultra 550B on the free account — the actual limit is the rate per minute/hour, not per month. Anonymous are limited by IP; with account you can do much more volume.If you reach 500+25 tokens and need more, a Pro plan at $9/month covers it.
What makes Nemotron 3 Ultra 550B special?
NVIDIA fine-tunes its models for fast inference on its own optimized hardware — good at technical questions and reasoning, its specific strengths are: 550b parameters (the largest free), frontier reasoning and 1m context tokens.
How fast does Nemotron 3 Ultra 550B respond?
Nemotron 3 Ultra 550B is a "think" model: it reasons explicitly before responding, so it takes longer — waits 15-45 seconds.The actual time also depends on the length of the prompt and the load of the datacenter — models with huge context take longer when you enter very long texts.
How do I use Nemotron 3 Ultra 550B in ia.gratis?
You can use Nemotron 3 Ultra 550B from /chat/ by selecting Nemotron 3 Ultra 550B in the picker, or via the REST API with `model=nemotron-3-ultra` in the POST body. Quick summary: 550B parameters. The largest free frontier reasoning. The internal model identifier is `nemotron-3-ultra` — useful when integrating via API.