NVIDIA: Nemotron 3 Ultra 550B A55B
Nemotron 3 Ultra 550B A55B is a reasoning model from NVIDIA released on Jun 4, 2026. It reads text and writes text, with a 1M token context window and up to 66K tokens per reply.
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It costs $0.50 per million input tokens and $2.50 per million output tokens. Cached input bills at $0.15, 70% less than fresh input.
It supports tool calling, structured JSON output and prompt caching, and its weights are open, so you can host it yourself.
20 providers serve it, including Baseten, Fireworks AI and Together AI. The lowest input price is $0.10 per million tokens at Ollama Cloud.
- Modalities
- In / out price
- $0.50 / $2.50 per 1M
- Context
- 1M
- Max output
- 66K
- Released
- Jun 4, 2026
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Nemotron 3 Ultra 550B A55B pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $0.50 / 1M tokens | |
|---|---|---|
| Output | $2.50 / 1M tokens | |
| Cached input (read) | $0.15 / 1M tokens | 70% off input |
Nemotron 3 Ultra 550B A55B providers
20 providers serve it, including Baseten, Fireworks AI and Together AI. The lowest input price is $0.10 per million tokens at Ollama Cloud. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Nvidia First party | $0.50 | $2.50 | $0.15 | 1M | 66K |
| Baseten | $0.60 | $2.40 | $0.12 | 203K | 203K |
| Fireworks AI | $0.60 | $2.40 | $0.12 | 262K | 128K |
| Together AI | $0.60 | $3.60 | $0.20 | 512K | 512K |
| Vercel AI Gateway | $0.60 | $2.40 | $0.12 | 1M | 65K |
| Nebius Token Factory | $1 | $3 | $1 | 1.05M | 1.05M |
| Ollama Cloud | $0.10 | $3 | $0.10 | 262K | 128K |
| routing.run | $0.10 | $0.10 | – | 131K | 32K |
| CoreWeave | $0.50 | $2.15 | $0.10 | 262K | 262K |
| DevPass (LLM Gateway) | $0.50 | $2.20 | $0.10 | 1.05M | 128K |
| Eden AI | $0.50 | $2.20 | $0.10 | 262K | 128K |
| NanoGPT | $0.50 | $2.50 | $0.25 | 1M | 66K |
Showing 12 of 20 providers: the lab first, then the major clouds, then the cheapest resellers.
What Nemotron 3 Ultra 550B A55B costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Nemotron 3 Ultra 550B A55B through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs - Reasoning
reasoning - Temperature
temperature
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Nemotron 3 Ultra 550B A55B questions
How much does the Nemotron 3 Ultra 550B A55B API cost?
$0.50 per million input tokens and $2.50 per million output tokens, with cached input at $0.15. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Nemotron 3 Ultra 550B A55B?
1,000,000 tokens of input, and it can write up to 65,536 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve Nemotron 3 Ultra 550B A55B?
20 providers serve it, including Baseten, Fireworks AI and Together AI. The lowest input price is $0.10 per million tokens at Ollama Cloud. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does Nemotron 3 Ultra 550B A55B support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is Nemotron 3 Ultra 550B A55B open source?
Its weights are published, so you can run it on your own hardware or a cloud of your choice. Read the license before commercial use.
When was Nemotron 3 Ultra 550B A55B released?
Jun 4, 2026.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on Nemotron 3 Ultra 550B A55B?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
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