ChatGPT-4o (March 2025) vs Claude Opus 4
Compare ChatGPT-4o (March 2025) by OpenAI against Claude Opus 4 by Anthropic, in 6 community votes, claude opus 4 wins 75% of head-to-head duels, context windows of 128K vs 200K, tested across 32 shared challenges.
Our Verdict
Claude Opus 4Winner
ChatGPT-4o (March 2025)Runner-up
Pick Claude Opus 4. In 6 blind votes, Claude Opus 4 wins 75% of the time. That's not luck.
ChatGPT-4o (March 2025) is 5.0x cheaper per token — worth considering if cost matters.
Clear winner
API pricing
Cost per 1M tokens
ChatGPT-4o (March 2025)
Input
$5.00
3.0× cheaper
Output
$15.00
5.0× cheaper
Claude Opus 4
Input
$15.00
Output
$75.00
ChatGPT-4o (March 2025) is cheaper on both — 3.0× input, 5.0× output
Writing DNA
Style Comparison
Similarity
51%
ChatGPT-4o (March 2025) uses 8.4x more emoji
ChatGPT-4o (March 2025)
Claude Opus 4
55%Vocabulary64%
24wSentence Length62w
0.52Hedging0.52
3.3Bold4.4
6.0Lists9.1
0.94Emoji0.11
0.63Headings1.87
0.05Transitions0.27
Based on 15 + 16 text responses
Research
What we learned reading every model
FAQ
