NVIDIA
Nemotron 3 Ultra 550B A55B
Largest Nemotron 3 model for maximum open-weight reasoning and agent accuracy
Model facts
- Context window
- 1.05M tokens
- Maximum output
- 128K tokens
- Cheapest paid input
- $0.1 per 1M tokens
- Cheapest paid output
- $0.1 per 1M tokens
- Open weights
- yes
- Providers
- 14
Capabilities and modalities
reasoning, tool calling, structured output, temperature control, open weights, text.
Local hardware estimate
At 4K context: Q4_K_M 301.7 GiB, Q8_0 562.7 GiB, F16 1052.1 GiB working memory.
- Parameters
- 560.5 billion
- Architecture
- nemotronh
- Model license
- other
Planning estimate adapted from the MIT-licensed whichllm estimator using metadata from Hugging Face; not a vendor minimum requirement.
Artificial Analysis benchmarks
Compare this model on the full LLM benchmark leaderboard.
| Configuration | AAI | Coding | Math | Output tokens/s |
|---|---|---|---|---|
| Reasoning | 38.3 | 49.3 | not measured | 148.3 |
Observed price history
- 2026-08-24: $0.1 input / $0.1 output per 1M tokens
API providers
- Kenari — model id nemotron-3-ultra-550b-a55b; free input / free output per 1M tokens; provider documentation
- Requesty — model id nemotron-3-ultra-550b-a55b; free input / free output per 1M tokens; provider documentation
- UnoRouter — model id nemotron-3-ultra-550b-a55b:free; free input / free output per 1M tokens; provider documentation
- routing.run — model id nemotron-3-ultra; $0.1 input / $0.1 output per 1M tokens; provider documentation
- DevPass (LLM Gateway) — model id nemotron-3-ultra-550b; $0.5 input / $2.2 output per 1M tokens; provider documentation
- Eden AI — model id deepinfra/nemotron-3-ultra-550b-a55b; $0.5 input / $2.2 output per 1M tokens; provider documentation
- Kilo Gateway — model id nvidia/nemotron-3-ultra-550b-a55b; $0.5 input / $2.2 output per 1M tokens; provider documentation
- Fireworks AI — model id accounts/fireworks/models/nemotron-3-ultra-nvfp4; $0.6 input / $2.4 output per 1M tokens; provider documentation
- Nvidia — model id nvidia/nemotron-3-ultra-550b-a55b; $0.5 input / $2.5 output per 1M tokens; provider documentation
- Pioneer — model id nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16; $0.5 input / $2.5 output per 1M tokens; provider documentation
- OpenRouter — model id nvidia/nemotron-3-ultra-550b-a55b; $0.625 input / $3.12 output per 1M tokens; provider documentation
- Eden AI — model id nebius/nvidia/Nemotron-3-Ultra-550b-a55b; $1 input / $3 output per 1M tokens; provider documentation
- Nebius Token Factory — model id nvidia/Nemotron-3-Ultra-550b-a55b; $1 input / $3 output per 1M tokens; provider documentation
- Together AI — model id nvidia/nemotron-3-ultra-550b-a55b; $0.6 input / $3.6 output per 1M tokens; provider documentation