Claude Opus 4.1 vs Gemini 2.5 Pro (I/O Edition)
Compare Claude Opus 4.1 by Anthropic against Gemini 2.5 Pro (I/O Edition) by Google AI, in 10 community votes, claude opus 4.1 wins 56% of head-to-head duels, tested across 40 shared challenges.
Image Generation: Gemini 2.5 Pro (I/O Edition) wins 80% of votes
Web Design: Claude Opus 4.1 wins 100% of votes
Our Verdict
Claude Opus 4.1Winner
Gemini 2.5 Pro (I/O Edition)Runner-up
Claude Opus 4.1 has the edge overall. In 10 blind votes, Claude Opus 4.1 wins 56% of the time.
Pick Claude Opus 4.1 for Web Design. Pick Gemini 2.5 Pro (I/O Edition) for Image Generation. Gemini 2.5 Pro (I/O Edition) is 7.5x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
Claude Opus 4.1
Input
$15.00
Output
$75.00
Gemini 2.5 Pro (I/O Edition)
Input
$1.25
12× cheaper
Output
$10.00
7.5× cheaper
Gemini 2.5 Pro (I/O Edition) is cheaper on both — 12× input, 7.5× output
Writing DNA
Style Comparison
Similarity
47%
Claude Opus 4.1 uses 38.4x more emoji
Claude Opus 4.1
Gemini 2.5 Pro (I/O Edition)
61%Vocabulary58%
87wSentence Length16w
0.54Hedging0.38
5.1Bold5.8
6.7Lists5.0
0.38Emoji0.00
1.68Headings0.63
0.13Transitions0.01
Based on 17 + 16 text responses
Research
What we learned reading every model
FAQ
