Llama 3.1 405B vs 
Qwen3.5 Plus 2026-02-15
Qwen3.5 Plus 2026-02-15 is cheaper than Llama 3.1 405B at $0.4/M vs $2.7/M input tokens.
Framer-Style Animation
Sections that transition like Framer. Timing is the whole grade.
Loading the build
Loading the build
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
Qwen3.5 Plus 2026-02-15Qwen3.5 Plus 2026-02-15
The Shawshank Redemption
Kind of Blue
The Hitchhiker's Guide to the Galaxy
Tokyo
The Legend of Zelda: Breath of the Wild
Price and specs
| Spec | Llama 3.1 405B | Qwen3.5 Plus 2026-02-15 |
|---|---|---|
| Input price | $2.7/M tokens | $0.4/M tokens |
| Output price | $3.1/M tokens | $2.4/M tokens |
| Context window | 128K tokens | 1.0M tokens |
| Parameters | 405B | Not disclosed |
| Weights | Open | Closed |
| Free API (OpenRouter) | No | No |
| Released | Jul 2024 | Feb 2026 |
| At 10M a month | $27.00 | $4.00 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Llama 3.1 405B
No hosts listed on OpenRouter.
Qwen3.5 Plus 2026-02-151 host
Per million tokens. Prices and uptime via OpenRouter, checked 12 Oct 2026.
Common questions
What is the difference between Llama 3.1 405B and Qwen3.5 Plus 2026-02-15?
Llama 3.1 405B is developed by Meta AI while Qwen3.5 Plus 2026-02-15 is developed by Qwen. Llama 3.1 405B has a 128K token context window vs Qwen3.5 Plus 2026-02-15'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 Qwen3.5 Plus 2026-02-15?
It depends on your use case. Llama 3.1 405B and Qwen3.5 Plus 2026-02-15 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 Qwen3.5 Plus 2026-02-15?
Llama 3.1 405B costs $2.7/M input tokens and Qwen3.5 Plus 2026-02-15 costs $0.4/M input tokens. Qwen3.5 Plus 2026-02-15 is $2.30/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 Qwen3.5 Plus 2026-02-15 on Rival?
This page shows a side-by-side comparison of Llama 3.1 405B and Qwen3.5 Plus 2026-02-15 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.
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