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  5. Claude 3.7 Thinking SonnetvsDeepSeek V4 Flash Vision Exp
Updated Aug 2026

Claude 3.7 Thinking SonnetvsDeepSeek V4 Flash Vision Exp

DeepSeek V4 Flash Vision Exp is cheaper than Claude 3.7 Thinking Sonnet at $0.22/M vs $6/M input tokens.

Claude 3.7 Thinking Sonnet and DeepSeek V4 Flash Vision Exp compared across 8 shared prompts
SpecClaude 3.7 Thinking SonnetDeepSeek V4 Flash Vision Exp
Input price$6/M tokens$0.22/M tokens
Output price$30/M tokens$0.66/M tokens
Context window200K tokens1.0M tokens
Weights—Open
Free API (OpenRouter)NoNo
ReleasedFeb 2025Aug 2026
Our Verdict
DeepSeek V4 Flash Vision Exp
DeepSeek V4 Flash Vision Exp
Claude 3.7 Thinking Sonnet
Claude 3.7 Thinking SonnetRunner-up

Not enough votes to call it. On the specs, DeepSeek V4 Flash Vision Exp has the edge: newer, bigger context window.

DeepSeek V4 Flash Vision Exp costs 45x less per token.

Too close to call
API pricing

Cost per 1M tokens

Claude 3.7 Thinking Sonnet
Input
$6.00
Output
$30.00
DeepSeek V4 Flash Vision Exp
Input
$0.22
27× cheaper
Output
$0.66
45× cheaper

DeepSeek V4 Flash Vision Exp is cheaper on both: 27× input, 45× output.

Where to run it

5 hosts, cheapest first

Claude 3.7 Thinking Sonnet

No hosts listed on OpenRouter.

DeepSeek V4 Flash Vision Exp5 hosts
HostInOutContextUptime
FFireworks$0.22 in·$0.66 out·1M·99.9% upGGMI Cloudfp8$0.44 in·$1.32 out·1M·99.8% upNNovita$0.44 in·$1.32 out·1M·99.9% upSSiliconFlowfp8$0.44 in·$1.32 out·1M·97.1% upDDeepInfrafp8degraded$0.22 in·$0.65 out·1M·77.7% 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 Thinking Sonnet is developed by Anthropic while DeepSeek V4 Flash Vision Exp is developed by DeepSeek. Claude 3.7 Thinking Sonnet has a 200K token context window vs DeepSeek V4 Flash Vision Exp'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 Thinking Sonnet and DeepSeek V4 Flash Vision Exp 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 Thinking Sonnet costs $6/M input tokens and DeepSeek V4 Flash Vision Exp costs $0.22/M input tokens. DeepSeek V4 Flash Vision Exp is $5.78/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 Thinking Sonnet and DeepSeek V4 Flash Vision Exp 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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Model pages

Claude 3.7 Thinking Sonnet logo
Claude 3.7 Thinking Sonnet59 outputs, specs and price
DeepSeek V4 Flash Vision Exp logo
DeepSeek V4 Flash Vision Exp8 outputs, specs and price
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