Claude Sonnet 4.5 vs Claude Sonnet 4
Compare Claude Sonnet 4.5 and Claude Sonnet 4, both from Anthropic, in 23 community votes, claude sonnet 4.5 wins 82% of head-to-head duels, context windows of 200K vs 200K, tested across 43 shared challenges.
Web Design: Claude Sonnet 4.5 wins 88% of votes
Reasoning: Claude Sonnet 4.5 wins 100% of votes
Image Generation: Claude Sonnet 4.5 wins 67% of votes
Our Verdict
Claude Sonnet 4.5Winner
Claude Sonnet 4Runner-up
Pick Claude Sonnet 4.5. In 23 blind votes, Claude Sonnet 4.5 wins 82% of the time. That's not luck.
Claude Sonnet 4.5 particularly excels in Reasoning, Web Design, Image Generation.
Clear winner
API pricing
Cost per 1M tokens
Claude Sonnet 4.5
Input
$3.00
Output
$15.00
Claude Sonnet 4
Input
$3.00
Output
$15.00
Writing DNA
Style Comparison
Similarity
91%
Claude Sonnet 4 uses 4.4x more transitions
Claude Sonnet 4.5
Claude Sonnet 4
64%Vocabulary62%
94wSentence Length111w
0.48Hedging0.40
4.9Bold5.0
8.0Lists9.3
0.45Emoji0.88
1.91Headings2.16
0.07Transitions0.33
Based on 20 + 17 text responses
Research
What we learned reading every model
FAQ
