Llama 3.1 405B vs 
o1
Llama 3.1 405B is cheaper than o1 at $2.7/M vs $15/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?
Price and specs
| Spec | Llama 3.1 405B | o1 |
|---|---|---|
| Input price | $2.7/M tokens | $15/M tokens |
| Output price | $3.1/M tokens | $60/M tokens |
| Context window | 128K tokens | 128K tokens |
| Parameters | 405B | Not disclosed |
| Weights | Open | Closed |
| Free API (OpenRouter) | No | No |
| Released | Jul 2024 | Dec 2024 |
| MMLU | 88.6% | 91.8% |
| At 10M a month | $27.00 | $150 |
Input tokens at list price. No caching, no batch discount.
Where to run it
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 Llama 3.1 405B and o1?
Llama 3.1 405B is developed by Meta AI while o1 is developed by OpenAI. Llama 3.1 405B has a 128K token context window vs o1's 128K. 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 o1?
It depends on your use case. Llama 3.1 405B and o1 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 o1?
Llama 3.1 405B costs $2.7/M input tokens and o1 costs $15/M input tokens. Llama 3.1 405B is $12.30/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 o1 on Rival?
This page shows a side-by-side comparison of Llama 3.1 405B and o1 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
- Llama 3.1 405B vs GPT-6.1 SolLanded Sep 2026
- o1 vs Claude Sonnet 5.5Landed Sep 2026
- Llama 3.1 405B vs Solar Mini 4Landed Sep 2026
- o1 vs Qwen3.8 Max PrimeLanded Sep 2026
- Llama 3.1 405B vs GLM 5.3 PrimeLanded Sep 2026
- o1 vs Qwen3.8 Omni FlashLanded Sep 2026
- Llama 3.1 405B vs Command A+Landed Sep 2026
- o1 vs Claude Opus 5.5Landed Sep 2026
