Claude Haiku 4.5 vs Claude Sonnet 4
Compare Claude Haiku 4.5 and Claude Sonnet 4, both from Anthropic, in 14 community votes, claude haiku 4.5 wins 78% of head-to-head duels, context windows of 200K vs 200K, tested across 54 shared challenges.
Web Design: Claude Haiku 4.5 wins 83% of votes
Our Verdict
Claude Haiku 4.5Winner
Claude Sonnet 4Runner-up
Pick Claude Haiku 4.5. In 14 blind votes, Claude Haiku 4.5 wins 78% of the time. That's not luck.
Claude Haiku 4.5 particularly excels in Web Design. Claude Haiku 4.5 is 3.0x cheaper per token — worth considering if cost matters.
Clear winner
API pricing
Cost per 1M tokens
Claude Haiku 4.5
Input
$1.00
3.0× cheaper
Output
$5.00
3.0× cheaper
Claude Sonnet 4
Input
$3.00
Output
$15.00
Claude Haiku 4.5 is cheaper on both — 3.0× input, 3.0× output
Writing DNA
Style Comparison
Similarity
88%
Claude Sonnet 4 uses 4.3x more emoji
Claude Haiku 4.5
Claude Sonnet 4
61%Vocabulary62%
47wSentence Length111w
0.64Hedging0.40
5.1Bold5.0
6.3Lists9.3
0.20Emoji0.88
2.46Headings2.16
0.17Transitions0.33
Based on 24 + 17 text responses
Research
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