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  5. Llama 3.1 405BvsQwen3.8 Flash
Updated Aug 2026

Llama 3.1 405BvsQwen3.8 Flash

Qwen3.8 Flash is cheaper than Llama 3.1 405B at $0.15/M vs $2.7/M input tokens.

Llama 3.1 405B and Qwen3.8 Flash compared across 5 shared prompts
SpecLlama 3.1 405BQwen3.8 Flash
Input price$2.7/M tokens$0.15/M tokens
Output price$3.1/M tokens$0.47/M tokens
Context window128K tokens1.0M tokens
WeightsOpenClosed
Free API (OpenRouter)NoNo
ReleasedJul 2024Aug 2026
Our Verdict
Llama 3.1 405B
Llama 3.1 405B
Qwen3.8 Flash
Qwen3.8 Flash

Not enough votes to call it. On the specs, nothing separates them.

Qwen3.8 Flash costs 6.6x less per token.

Too close to call
API pricing

Cost per 1M tokens

Llama 3.1 405B
Input
$2.70
Output
$3.10
Qwen3.8 Flash
Input
$0.15
18× cheaper
Output
$0.47
6.6× cheaper

Qwen3.8 Flash is cheaper on both: 18× input, 6.6× output.

Where to run it

1 host

Llama 3.1 405B

No hosts listed on OpenRouter.

Qwen3.8 Flash1 host
HostInOutContextUptime
Alibaba Cloud$0.15 in·$0.47 out·1M·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 22 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Llama 3.1 405B is developed by Meta AI while Qwen3.8 Flash is developed by Qwen. Llama 3.1 405B has a 128K token context window vs Qwen3.8 Flash's 1.0M. You can compare their actual outputs across 5 challenges on Rival to see how they differ in practice.

It depends on your use case. Llama 3.1 405B and Qwen3.8 Flash each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 5 challenges so you can judge which fits your needs best.

Llama 3.1 405B costs $2.7/M input tokens and Qwen3.8 Flash costs $0.15/M input tokens. Qwen3.8 Flash is $2.55/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Llama 3.1 405B and Qwen3.8 Flash 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.

Keep exploring

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Llama 3.1 405B vs GLM 5.3Landed Sep 2026
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Same lab, same size, long tail

Llama 3.1 405B logoMuse Glimmer 30B logo
Llama 3.1 405B vs Muse Glimmer 30BSame lab
Llama 3.1 405B logoMuse Spark 1.3 logo
Llama 3.1 405B vs Muse Spark 1.3Same lab
Qwen3.8 Flash logoQwen3.8 Max (0902) logo
Qwen3.8 Flash vs Qwen3.8 Max (0902)Same lab
Qwen3.8 Flash logoQwen3.8 2.4T A95B logo
Qwen3.8 Flash vs Qwen3.8 2.4T A95BSame lab
Qwen3.8 Flash logoClaude Sonnet 3.6 (2022-10-22) logo
Qwen3.8 Flash vs Claude Sonnet 3.6 (2022-10-22)Same size
Qwen3.8 Flash logoClaude 3.7 Sonnet logo
Qwen3.8 Flash vs Claude 3.7 SonnetSame size
Qwen3.8 Flash logoClaude 3.7 Thinking Sonnet logo
Qwen3.8 Flash vs Claude 3.7 Thinking SonnetSame size
Qwen3.8 Flash logoClaude Sonnet 4.5 logo
Qwen3.8 Flash vs Claude Sonnet 4.5Same size

Model pages

Llama 3.1 405B logo
Llama 3.1 405B12 outputs, specs and price
Qwen3.8 Flash logo
Qwen3.8 Flash8 outputs, specs and price
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