Llama 3.1 405B vs 
Nemotron 3 Ultra
Nemotron 3 Ultra is cheaper than Llama 3.1 405B at $0/M vs $2.7/M input tokens.
Framer-Style Animation
Sections that transition like Framer. Timing is the whole grade.
Loading the build
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Which answer wins?
Favorites
Movie
Album
Book
City
Game
Llama 3.1 405BLlama 3.1 405B
No pick
No pick
No pick
No pick
Sgt Peppers Lonely Hearts Club Band
Cien años de soledad
No pick
No pick
Nemotron 3 UltraNemotron 3 Ultra
The Shawshank Redemption
The Dark Side of the Moon
To Kill a Mockingbird
Kyoto
The Legend of Zelda: Ocarina of Time
Price and specs
| Spec | Llama 3.1 405B | Nemotron 3 Ultra |
|---|---|---|
| Input price | $2.7/M tokens | Free |
| Output price | $3.1/M tokens | Free |
| Context window | 128K tokens | 1.0M tokens |
| Weights | Open | Open |
| Free API (OpenRouter) | No | Yes (1 provider) |
| Released | Jul 2024 | Jun 2026 |
| At 10M a month | $27.00 | $0 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Llama 3.1 405B
No hosts listed on OpenRouter.
Nemotron 3 Ultra1 host
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between Llama 3.1 405B and Nemotron 3 Ultra?
Llama 3.1 405B is developed by Meta AI while Nemotron 3 Ultra is developed by NVIDIA. Llama 3.1 405B has a 128K token context window vs Nemotron 3 Ultra's 1.0M. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.
Which is better, Llama 3.1 405B or Nemotron 3 Ultra?
It depends on your use case. Llama 3.1 405B and Nemotron 3 Ultra each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.
How much does Llama 3.1 405B cost compared to Nemotron 3 Ultra?
Llama 3.1 405B costs $2.7/M input tokens and Nemotron 3 Ultra costs $0/M input tokens. Nemotron 3 Ultra is $2.70/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.
How can I compare Llama 3.1 405B and Nemotron 3 Ultra on Rival?
This page shows a side-by-side comparison of Llama 3.1 405B and Nemotron 3 Ultra across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.
More comparisons
Against the newest arrivals
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Same lab, same size, long tail
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