Claude Haiku 4.5 vs Claude Opus 4
Compare Claude Haiku 4.5 and Claude Opus 4, both from Anthropic, context windows of 200K vs 200K, tested across 53 shared challenges.
Our Verdict
Claude Haiku 4.5
Claude Opus 4
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Claude Haiku 4.5 is 15x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Haiku 4.5
Input
$1.00
15× cheaper
Output
$5.00
15× cheaper
Claude Opus 4
Input
$15.00
Output
$75.00
Claude Haiku 4.5 is cheaper on both — 15× input, 15× output
Writing DNA
Style Comparison
Similarity
68%
Claude Haiku 4.5 uses 1.8x more emoji
Claude Haiku 4.5
Claude Opus 4
61%Vocabulary64%
47wSentence Length62w
0.64Hedging0.52
5.1Bold4.4
6.3Lists9.1
0.20Emoji0.11
2.46Headings1.87
0.17Transitions0.27
Based on 24 + 16 text responses
Research
What we learned reading every model
FAQ
