Claude Sonnet 5vsDeepSeek V4 Pro
DeepSeek V4 Pro is cheaper than Claude Sonnet 5 at $1.74/M vs $2/M input tokens.
| Spec | Claude Sonnet 5 | DeepSeek V4 Pro |
|---|---|---|
| Input price | $2/M tokens | $1.74/M tokens |
| Output price | $10/M tokens | $3.48/M tokens |
| Context window | 1.0M tokens | 1.0M tokens |
| Weights | Closed | Open |
| Free API (OpenRouter) | No | No |
| Released | Jun 2026 | Apr 2026 |
Our Verdict
Claude Sonnet 5
DeepSeek V4 Pro
Not enough votes to call it. On the specs, nothing separates them.
Too close to call
API pricing
Cost per 1M tokens
Claude Sonnet 5
Input
$2.00
Output
$10.00
DeepSeek V4 Pro
Input
$1.74
1.1× cheaper
Output
$3.48
2.9× cheaper
DeepSeek V4 Pro is cheaper on both: 1.1× input, 2.9× output.
Where to run it
19 hosts, cheapest first
DeepSeek V4 Pro15 hosts
DigitalOcean$0.87 in$1.74 out1M98.8% upStreamLakefp8$0.95 in$1.89 out1M98.9% upBaidu Qianfanfp8$0.95 in$1.90 out1M99.3% upGMI Cloudfp8$0.96 in$1.91 out1M96.8% upDeepInfrafp8$1.30 in$2.60 out1M99.3% upAlibaba Cloudfp8$1.42 in$2.83 out1M99.9% up
9 more hostsFewer hosts
SiliconFlowfp8$1.50 in$3.13 out1M98.3% upNovitafp8$1.60 in$3.20 out1M100% upVenice$1.65 in$3.30 out1M97.1% upAtlasCloudfp4$1.68 in$3.38 out1M97.4% upBasetenfp4$1.74 in$3.48 out1M99.6% upParasailfp8$1.74 in$3.48 out1M99.4% upNextBitfp8$1.80 in$3.55 out1M99.8% upAzure AI Foundry$1.91 in$3.83 out1M98.9% upFireworksdegraded$1.20 in$1.20 out1M0% up
Per million tokens. Prices and uptime via OpenRouter, checked 8 Sep 2026.
Writing DNA
Style Comparison
Similarity
43%
Claude Sonnet 5 uses 22.7x more emoji
Claude Sonnet 5
DeepSeek V4 Pro
59%Vocabulary57%
35wSentence Length18w
0.53Hedging0.52
3.5Bold3.3
3.5Lists2.3
0.79Emoji0.04
1.25Headings0.45
0.06Transitions0.15
Based on 27 + 27 text responses
Research
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FAQ
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