Claude Haiku 4.5 vs GPT-4o (Omni)
Compare Claude Haiku 4.5 by Anthropic against GPT-4o (Omni) by OpenAI, in 5 community votes, claude haiku 4.5 wins 67% of head-to-head duels, context windows of 200K vs 128K, tested across 54 shared challenges.
Web Design: Claude Haiku 4.5 and GPT-4o (Omni) are tied
Our Verdict
Claude Haiku 4.5Winner
GPT-4o (Omni)Runner-up
Pick Claude Haiku 4.5. In 5 blind votes, Claude Haiku 4.5 wins 67% of the time. That's not luck.
Clear winner
API pricing
Cost per 1M tokens
Claude Haiku 4.5
Input
$1.00
2.5× cheaper
Output
$5.00
2.0× cheaper
GPT-4o (Omni)
Input
$2.50
Output
$10.00
Claude Haiku 4.5 is cheaper on both — 2.5× input, 2.0× output
Writing DNA
Style Comparison
Similarity
54%
Claude Haiku 4.5 uses 8.1x more emoji
Claude Haiku 4.5
GPT-4o (Omni)
61%Vocabulary54%
47wSentence Length18w
0.64Hedging0.72
5.1Bold7.3
6.3Lists5.6
0.20Emoji0.03
2.46Headings1.40
0.17Transitions0.26
Based on 24 + 24 text responses
Research
What we learned reading every model
FAQ
