Kimi K2 vs 
Llama 3.1 405B
Kimi K2 is cheaper than Llama 3.1 405B at $0.57/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
Kimi K2Kimi K2
Blade Runner 2049
Dark Side Of The Moon
The Left Hand of Darkness
Kyoto
Outer Wilds
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
Price and specs
| Spec | Kimi K2 | Llama 3.1 405B |
|---|---|---|
| Input price | $0.57/M tokens | $2.7/M tokens |
| Output price | $2.3/M tokens | $3.1/M tokens |
| Context window | — | 128K tokens |
| Weights | Open | Open |
| Free API (OpenRouter) | No | No |
| Released | Jul 2025 | Jul 2024 |
| At 10M a month | $5.70 | $27.00 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Kimi K21 host
Llama 3.1 405B
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 5 Oct 2026.
Common questions
What is the difference between Kimi K2 and Llama 3.1 405B?
Kimi K2 is developed by Moonshot AI while Llama 3.1 405B is developed by Meta AI. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.
Which is better, Kimi K2 or Llama 3.1 405B?
It depends on your use case. Kimi K2 and Llama 3.1 405B 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 Kimi K2 cost compared to Llama 3.1 405B?
Kimi K2 costs $0.57/M input tokens and Llama 3.1 405B costs $2.7/M input tokens. Kimi K2 is $2.13/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 Kimi K2 and Llama 3.1 405B on Rival?
This page shows a side-by-side comparison of Kimi K2 and Llama 3.1 405B 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
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