xAI: Grok 4 vs Claude Sonnet 4

Compare xAI: Grok 4 by xAI against Claude Sonnet 4 by Anthropic, in 26 community votes, claude sonnet 4 wins 65% of head-to-head duels, context windows of 256K vs 200K, tested across 27 shared challenges. Updated April 2026.

Which is better, xAI: Grok 4 or Claude Sonnet 4?

Claude Sonnet 4 is the better choice overall, winning 65% of 26 blind community votes on Rival. xAI: Grok 4 costs $3/M input tokens vs $3/M for Claude Sonnet 4. Context windows: 256K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between xAI: Grok 4 and Claude Sonnet 4

xAI: Grok 4 is made by xai while Claude Sonnet 4 is from anthropic. xAI: Grok 4 has a 256K token context window compared to Claude Sonnet 4's 200K. On pricing, xAI: Grok 4 costs $3/M input tokens vs $3/M for Claude Sonnet 4. In community voting, In 26 community votes, Claude Sonnet 4 wins 65% of head-to-head duels.

In 26 community votes, Claude Sonnet 4 wins 65% of head-to-head duels. xAI: Grok 4 leads in Web Design, while Claude Sonnet 4 leads in Image Generation. Based on blind community voting from the Rival open dataset of 26+ human preference judgments for this pair.

Image Generation: Claude Sonnet 4 wins 89% of votes
Web Design: xAI: Grok 4 wins 71% of votes
Our Verdict
Claude Sonnet 4
Claude Sonnet 4Winner
xAI: Grok 4
xAI: Grok 4Runner-up

Pick Claude Sonnet 4. In 26 blind votes, Claude Sonnet 4 wins 65% of the time. That's not luck.

Pick xAI: Grok 4 for Web Design. Pick Claude Sonnet 4 for Image Generation.

Clear winner
Writing DNA

Style Comparison

Similarity
97%

Claude Sonnet 4 uses 12.5x more emoji

xAI: Grok 4
Claude Sonnet 4
53%Vocabulary62%
18wSentence Length111w
0.67Hedging0.40
2.7Bold5.0
2.7Lists9.3
0.07Emoji0.88
0.86Headings2.16
0.04Transitions0.33
Based on 21 + 17 text responses
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xAI: Grok 4Claude Sonnet 4

279 AI models invented the same fake scientist.

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AI Hallucination Index 2026
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