Claude Opus 4.5
Nothing here. The model returned empty. We stared at it for a while.
Claude Opus 4.5 vs xAI: Grok 4
Compare Claude Opus 4.5 by Anthropic against xAI: Grok 4 by xAI, in 17 community votes, claude opus 4.5 wins 82% of head-to-head duels, tested across 38 shared challenges. Updated April 2026.
Which is better, Claude Opus 4.5 or xAI: Grok 4?
Claude Opus 4.5 is the better choice overall, winning 82% of 17 blind community votes on Rival. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4.5 and xAI: Grok 4
Claude Opus 4.5 is made by anthropic while xAI: Grok 4 is from xai. In community voting, In 17 community votes, Claude Opus 4.5 wins 82% of head-to-head duels.
In 17 community votes, Claude Opus 4.5 wins 82% of head-to-head duels. Claude Opus 4.5 leads in Web Design, Image Generation. Based on blind community voting from the Rival open dataset of 17+ human preference judgments for this pair.
Web Design: Claude Opus 4.5 wins 92% of votes
Image Generation: Claude Opus 4.5 wins 100% of votes
Our Verdict
Claude Opus 4.5Winner
xAI: Grok 4Runner-up
Pick Claude Opus 4.5. In 17 blind votes, Claude Opus 4.5 wins 82% of the time. That's not luck.
Claude Opus 4.5 particularly excels in Image Generation, Web Design.
Clear winner
Writing DNA
Style Comparison
Similarity
97%
Claude Opus 4.5 uses 3.1x more sentence length
Claude Opus 4.5
xAI: Grok 4
64%Vocabulary53%
55wSentence Length18w
0.86Hedging0.67
5.8Bold2.7
4.5Lists2.7
0.15Emoji0.07
1.59Headings0.86
0.05Transitions0.04
Based on 24 + 21 text responses
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