Claude Sonnet 4.5
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Claude Sonnet 4.5 vs Claude Opus 4.5
Compare Claude Sonnet 4.5 and Claude Opus 4.5, both from Anthropic, in 253 community votes, claude opus 4.5 wins 64% of head-to-head duels, tested across 43 shared challenges. Updated April 2026.
Which is better, Claude Sonnet 4.5 or Claude Opus 4.5?
Claude Opus 4.5 is the better choice overall, winning 64% of 253 blind community votes on Rival. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 4.5 and Claude Opus 4.5
Claude Sonnet 4.5 is made by anthropic while Claude Opus 4.5 is from anthropic. In community voting, In 253 community votes, Claude Opus 4.5 wins 64% of head-to-head duels.
In 253 community votes, Claude Opus 4.5 wins 64% of head-to-head duels. Claude Sonnet 4.5 leads in Analysis, while Claude Opus 4.5 leads in Web Design, Image Generation, Conversation. Based on blind community voting from the Rival open dataset of 253+ human preference judgments for this pair.
Web Design: Claude Opus 4.5 wins 56% of votes
Image Generation: Claude Opus 4.5 wins 85% of votes
Reasoning: Claude Sonnet 4.5 and Claude Opus 4.5 are tied
Conversation: Claude Opus 4.5 wins 71% of votes
Analysis: Claude Sonnet 4.5 wins 67% of votes
Our Verdict
Claude Opus 4.5Winner
Claude Sonnet 4.5Runner-up
Pick Claude Opus 4.5. In 253 blind votes, Claude Opus 4.5 wins 64% of the time. That's not luck.
Pick Claude Sonnet 4.5 for Analysis. Pick Claude Opus 4.5 for Image Generation, Conversation, Web Design.
Clear winner
Writing DNA
Style Comparison
Similarity
100%
Claude Sonnet 4.5 uses 3.0x more emoji
Claude Sonnet 4.5
Claude Opus 4.5
64%Vocabulary64%
94wSentence Length55w
0.48Hedging0.86
4.9Bold5.8
8.0Lists4.5
0.45Emoji0.15
1.91Headings1.59
0.07Transitions0.05
Based on 20 + 24 text responses
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