Claude Haiku 4.5 vs Gemini 2.5 Pro (I/O Edition)
Compare Claude Haiku 4.5 by Anthropic against Gemini 2.5 Pro (I/O Edition) by Google AI, in 9 community votes, gemini 2.5 pro (i/o edition) wins 56% of head-to-head duels, tested across 41 shared challenges.
Web Design: Gemini 2.5 Pro (I/O Edition) wins 57% of votes
Image Generation: Claude Haiku 4.5 and Gemini 2.5 Pro (I/O Edition) are tied
Our Verdict
Gemini 2.5 Pro (I/O Edition)Winner
Claude Haiku 4.5Runner-up
Gemini 2.5 Pro (I/O Edition) has the edge overall. In 9 blind votes, Gemini 2.5 Pro (I/O Edition) wins 56% of the time.
Gemini 2.5 Pro (I/O Edition) particularly excels in Web Design.
Slight edge
API pricing
Cost per 1M tokens
Claude Haiku 4.5
Input
$1.00
1.3× cheaper
Output
$5.00
2.0× cheaper
Gemini 2.5 Pro (I/O Edition)
Input
$1.25
Output
$10.00
Claude Haiku 4.5 is cheaper on both — 1.3× input, 2.0× output
Writing DNA
Style Comparison
Similarity
39%
Claude Haiku 4.5 uses 20.4x more emoji
Claude Haiku 4.5
Gemini 2.5 Pro (I/O Edition)
61%Vocabulary58%
47wSentence Length16w
0.64Hedging0.38
5.1Bold5.8
6.3Lists5.0
0.20Emoji0.00
2.46Headings0.63
0.17Transitions0.01
Based on 24 + 16 text responses
Research
What we learned reading every model
FAQ
