Claude 3.7 Sonnet vs Grok 3 Thinking

Compare Claude 3.7 Sonnet by Anthropic against Grok 3 Thinking by xAI, in 6 community votes, claude 3.7 sonnet wins 100% of head-to-head duels, context windows of 200K vs 128K, tested across 14 shared challenges. Updated April 2026.

Which is better, Claude 3.7 Sonnet or Grok 3 Thinking?

Claude 3.7 Sonnet is the better choice overall, winning 100% of 6 blind community votes on Rival. Context windows: 200K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between Claude 3.7 Sonnet and Grok 3 Thinking

Claude 3.7 Sonnet is made by anthropic while Grok 3 Thinking is from xai. Claude 3.7 Sonnet has a 200K token context window compared to Grok 3 Thinking's 128K. In community voting, In 6 community votes, Claude 3.7 Sonnet wins 100% of head-to-head duels.

In 6 community votes, Claude 3.7 Sonnet wins 100% of head-to-head duels. Claude 3.7 Sonnet leads in Web Design, Image Generation. Based on blind community voting from the Rival open dataset of 6+ human preference judgments for this pair.

Web Design: Claude 3.7 Sonnet wins 100% of votes
Image Generation: Claude 3.7 Sonnet wins 100% of votes
Our Verdict
Claude 3.7 Sonnet
Claude 3.7 SonnetWinner
Grok 3 Thinking
Grok 3 ThinkingRunner-up

Pick Claude 3.7 Sonnet. In 6 blind votes, Claude 3.7 Sonnet wins 100% of the time. That's not luck.

Claude 3.7 Sonnet particularly excels in Web Design, Image Generation.

Clear winner
Writing DNA

Style Comparison

Similarity
97%

Claude 3.7 Sonnet uses 2.8x more headings

Claude 3.7 Sonnet
Grok 3 Thinking
62%Vocabulary46%
35wSentence Length19w
0.99Hedging1.11
1.2Bold3.3
4.3Lists2.6
0.00Emoji0.00
1.78Headings0.64
0.23Transitions0.25
Based on 13 + 6 text responses
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Claude 3.7 SonnetGrok 3 Thinking

279 AI models invented the same fake scientist.

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

AI Hallucination Index 2026
Free preview13 of 58 slides
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