Claude Opus 4 vs OpenAI o3
Compare Claude Opus 4 by Anthropic against OpenAI o3 by OpenAI, in 42 community votes, claude opus 4 wins 72% of head-to-head duels, tested across 53 shared challenges.
Web Design: Claude Opus 4 wins 72% of votes
Image Generation: Claude Opus 4 wins 86% of votes
Reasoning: OpenAI o3 wins 100% of votes
Our Verdict
Claude Opus 4Winner
OpenAI o3Runner-up
Pick Claude Opus 4. In 42 blind votes, Claude Opus 4 wins 72% of the time. That's not luck.
Pick Claude Opus 4 for Image Generation, Web Design. Pick OpenAI o3 for Reasoning.
Clear winner
API pricing
Cost per 1M tokens
Claude Opus 4
Input
$15.00
Output
$75.00
OpenAI o3
Input
$10.00
1.5× cheaper
Output
$40.00
1.9× cheaper
OpenAI o3 is cheaper on both — 1.5× input, 1.9× output
Writing DNA
Style Comparison
Similarity
45%
Claude Opus 4 uses 11.2x more emoji
Claude Opus 4
OpenAI o3
64%Vocabulary68%
62wSentence Length14w
0.52Hedging0.26
4.4Bold0.7
9.1Lists3.0
0.11Emoji0.00
1.87Headings0.38
0.27Transitions0.12
Based on 16 + 16 text responses
Research
What we learned reading every model
FAQ
