Claude Sonnet 4 vs Gemini 2.5 Pro (I/O Edition)
Compare Claude Sonnet 4 by Anthropic against Gemini 2.5 Pro (I/O Edition) by Google AI, in 28 community votes, gemini 2.5 pro (i/o edition) wins 63% of head-to-head duels, tested across 41 shared challenges.
Image Generation: Gemini 2.5 Pro (I/O Edition) wins 57% of votes
Web Design: Gemini 2.5 Pro (I/O Edition) wins 60% of votes
Reasoning: Gemini 2.5 Pro (I/O Edition) wins 67% of votes
Conversation: Gemini 2.5 Pro (I/O Edition) wins 100% of votes
Our Verdict
Gemini 2.5 Pro (I/O Edition)Winner
Claude Sonnet 4Runner-up
Pick Gemini 2.5 Pro (I/O Edition). In 28 blind votes, Gemini 2.5 Pro (I/O Edition) wins 63% of the time. That's not luck.
Gemini 2.5 Pro (I/O Edition) particularly excels in Conversation, Reasoning, Web Design.
Clear winner
API pricing
Cost per 1M tokens
Claude Sonnet 4
Input
$3.00
Output
$15.00
Gemini 2.5 Pro (I/O Edition)
Input
$1.25
2.4× cheaper
Output
$10.00
1.5× cheaper
Gemini 2.5 Pro (I/O Edition) is cheaper on both — 2.4× input, 1.5× output
Writing DNA
Style Comparison
Similarity
47%
Claude Sonnet 4 uses 87.9x more emoji
Claude Sonnet 4
Gemini 2.5 Pro (I/O Edition)
62%Vocabulary58%
111wSentence Length16w
0.40Hedging0.38
5.0Bold5.8
9.3Lists5.0
0.88Emoji0.00
2.16Headings0.63
0.33Transitions0.01
Based on 17 + 16 text responses
Research
What we learned reading every model
FAQ
