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.
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
API pricing
Cost per 1M tokens
Claude Sonnet 4.5
Input
$3.00
Output
$15.00
Claude Opus 4.5
Input
—
Output
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Writing DNA
Style Comparison
Similarity
87%
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
Research
What we learned reading every model
FAQ
