Claude 3 Sonnet vs DeepSeek R1

Compare Claude 3 Sonnet by Anthropic against DeepSeek R1 by DeepSeek, tested across 13 shared challenges. Updated April 2026.

Which is better, Claude 3 Sonnet or DeepSeek R1?

Claude 3 Sonnet and DeepSeek R1 are both competitive models. Claude 3 Sonnet costs $3/M input tokens vs $0.55/M for DeepSeek R1. Compare their real outputs side by side below.

Key Differences Between Claude 3 Sonnet and DeepSeek R1

Claude 3 Sonnet is made by anthropic while DeepSeek R1 is from deepseek. On pricing, Claude 3 Sonnet costs $3/M input tokens vs $0.55/M for DeepSeek R1.

Our Verdict
Claude 3 Sonnet
Claude 3 Sonnet
DeepSeek R1
DeepSeek R1

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

DeepSeek R1 is 6.8x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
96%

DeepSeek R1 uses 800.0x more bold

Claude 3 Sonnet
DeepSeek R1
48%Vocabulary62%
14wSentence Length15w
0.32Hedging0.52
0.0Bold8.0
3.6Lists5.7
0.00Emoji0.04
0.00Headings0.62
0.38Transitions0.28
Based on 4 + 22 text responses
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Claude 3 SonnetDeepSeek R1

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

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