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  5. Claude 3.7 SonnetvsQwen3.8 Flash
Updated Aug 2026

Claude 3.7 SonnetvsQwen3.8 Flash

Qwen3.8 Flash is cheaper than Claude 3.7 Sonnet at $0.15/M vs $3/M input tokens.

Claude 3.7 Sonnet and Qwen3.8 Flash compared across 8 shared prompts
SpecClaude 3.7 SonnetQwen3.8 Flash
Input price$3/M tokens$0.15/M tokens
Output price$15/M tokens$0.47/M tokens
Context window200K tokens1.0M tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedFeb 2025Aug 2026
Our Verdict
Claude 3.7 Sonnet
Claude 3.7 Sonnet
Qwen3.8 Flash
Qwen3.8 Flash

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

Qwen3.8 Flash costs 32x less per token.

Too close to call
API pricing

Cost per 1M tokens

Claude 3.7 Sonnet
Input
$3.00
Output
$15.00
Qwen3.8 Flash
Input
$0.15
20× cheaper
Output
$0.47
32× cheaper

Qwen3.8 Flash is cheaper on both: 20× input, 32× output.

Where to run it

1 host

Claude 3.7 Sonnet

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

Claude 3.7 Sonnet is developed by Anthropic while Qwen3.8 Flash is developed by Qwen. Claude 3.7 Sonnet has a 200K token context window vs Qwen3.8 Flash's 1.0M. You can compare their actual outputs across 8 challenges on Rival to see how they differ in practice.

It depends on your use case. Claude 3.7 Sonnet and Qwen3.8 Flash each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 8 challenges so you can judge which fits your needs best.

Claude 3.7 Sonnet costs $3/M input tokens and Qwen3.8 Flash costs $0.15/M input tokens. Qwen3.8 Flash is $2.85/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 Claude 3.7 Sonnet 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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Same lab, same size, long tail

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Qwen3.8 Flash vs Qwen3.8 Max (0902)Same lab
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Qwen3.8 Flash logoQwen3 235B A22B 2507 logo
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Qwen3.8 Flash vs Qwen3 235B A22B Thinking 2507Same lab
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Qwen3.8 Flash vs Qwen3 30B A3BSame lab

Model pages

Claude 3.7 Sonnet logo
Claude 3.7 Sonnet60 outputs, specs and price
Qwen3.8 Flash logo
Qwen3.8 Flash8 outputs, specs and price
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