# Nemotron Ultra

> Nemotron Ultra, a family of models by NVIDIA, listed from OpenRouter. Indexed, not reviewed: facts and our own checks, no score or ranking. NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total…

- Canonical: https://www.anchorterminal.com/tools/nemotron-ultra
- Markdown: https://www.anchorterminal.com/tools/nemotron-ultra.md (~500 tokens)
- Slim: https://www.anchorterminal.com/tools/nemotron-ultra.min.md (~430 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/tools/nemotron-ultra.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-05

# Nemotron Ultra

> Indexed, not reviewed: facts from OpenRouter and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: model family, by NVIDIA
- Category: Model APIs & inference (https://www.anchorterminal.com/categories/inference.md)
- Listed because: OpenRouter lists it, with prices from the providers that serve it.
- What OpenRouter says: NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it...

## Models (1)

| Model | OpenRouter id | Released | Context | Input $/1M | Output $/1M | Supports |
| --- | --- | --- | --- | --- | --- | --- |
| Nemotron 3 Ultra | `nvidia/nemotron-3-ultra-550b-a55b` | 2026-06 | 262k | $0.50 | $2.20 | tools, structured output, reasoning, caching, free variant |

Prices and limits as OpenRouter lists them; a provider's own price can differ.

- JSON: https://www.anchorterminal.com/api/v1/tools/nemotron-ultra.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming