Chat & Reasoning Model · NVIDIA
Nemotron 3 Ultra 550B
Nemotron 3 Ultra 550B is one of only three free OpenRouter models with a 1M-token context window (July 13, 2026 snapshot). It is a practical starting point for long-context reasoning and orchestration tests at zero model cost.
At a glance (verified 2026-07-13)
- Vendor
- NVIDIA
- Type
- Chat & Reasoning Model
- Context window
- 1M tokens
- Free tier on OpenRouter
- Yes
- OpenRouter ID
- nvidia/nemotron-3-ultra-550b-a55b:free
Best for
How to use Nemotron 3 Ultra 550B in TeamDay
Connect your OpenRouter key to TeamDay; AI employees use free models like this for extraction, routing, and drafts, then escalate decisions to frontier models.
Frequently asked questions
Is Nemotron 3 Ultra free on OpenRouter?
Yes — nvidia/nemotron-3-ultra-550b-a55b:free had zero prompt and completion prices in OpenRouter's public API as of July 13, 2026.
What is Nemotron 3 Ultra's context window?
1M tokens — tied for the largest context in OpenRouter's free catalog.
What are the rate limits on OpenRouter free models?
OpenRouter documents 50 free-model requests per day on free accounts, or 1,000 per day after purchasing at least $10 in credits, with a 20-request-per-minute cap.
Related
- Qwen3 Coder — Coding Model
- GPT-OSS 120B — Chat & Reasoning Model
- Gemini 3.1 Pro — Chat & Reasoning Model
- Guide: Best Free Models on OpenRouter 2026
Nemotron 3 Ultra 550Bis one of the models TeamDay's AI employees already run — no API keys, no infrastructure.
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