Claude Sonnet 4.6 vs DeepSeek R1

Compare Claude Sonnet 4.6 by Anthropic against DeepSeek R1 by DeepSeek, context windows of 1.0M vs 128K, tested across 52 shared challenges. Updated April 2026.

Which is better, Claude Sonnet 4.6 or DeepSeek R1?

Claude Sonnet 4.6 and DeepSeek R1 are both competitive models. Claude Sonnet 4.6 costs $3/M input tokens vs $0.55/M for DeepSeek R1. Context windows: 1000K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between Claude Sonnet 4.6 and DeepSeek R1

Claude Sonnet 4.6 is made by anthropic while DeepSeek R1 is from deepseek. Claude Sonnet 4.6 has a 1000K token context window compared to DeepSeek R1's 128K. On pricing, Claude Sonnet 4.6 costs $3/M input tokens vs $0.55/M for DeepSeek R1.

Our Verdict
Claude Sonnet 4.6
Claude Sonnet 4.6
DeepSeek R1
DeepSeek R1Runner-up

No community votes yet. On paper, Claude Sonnet 4.6 has the edge — newer, bigger context window.

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

Too close to call
Writing DNA

Style Comparison

Similarity
84%

DeepSeek R1 uses 14.3x more transitions

Claude Sonnet 4.6
DeepSeek R1
56%Vocabulary62%
36wSentence Length15w
0.53Hedging0.52
5.1Bold8.0
3.4Lists5.7
0.19Emoji0.04
2.10Headings0.62
0.02Transitions0.28
Based on 23 + 22 text responses
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Claude Sonnet 4.6DeepSeek R1

279 AI models invented the same fake scientist.

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