Claude Opus 4.1 vs GPT-5 Codex
Compare Claude Opus 4.1 by Anthropic against GPT-5 Codex by OpenAI, in 66 community votes, claude opus 4.1 wins 62% of head-to-head duels, tested across 49 shared challenges.
Web Design: Claude Opus 4.1 wins 75% of votes
Image Generation: GPT-5 Codex wins 58% of votes
Reasoning: GPT-5 Codex wins 63% of votes
Analysis: Claude Opus 4.1 wins 83% of votes
Conversation: Claude Opus 4.1 wins 75% of votes
Our Verdict
Claude Opus 4.1Winner
GPT-5 CodexRunner-up
Pick Claude Opus 4.1. In 66 blind votes, Claude Opus 4.1 wins 62% of the time. That's not luck.
Pick Claude Opus 4.1 for Analysis, Web Design, Conversation. Pick GPT-5 Codex for Reasoning, Image Generation.
Clear winner
API pricing
Cost per 1M tokens
Claude Opus 4.1
Input
$15.00
Output
$75.00
GPT-5 Codex
Input
—
Output
—
Writing DNA
Style Comparison
Similarity
35%
Claude Opus 4.1 uses 5.1x more sentence length
Claude Opus 4.1
GPT-5 Codex
61%Vocabulary64%
87wSentence Length17w
0.54Hedging0.38
5.1Bold2.3
6.7Lists3.5
0.38Emoji0.15
1.68Headings0.49
0.13Transitions0.05
Based on 17 + 13 text responses
Research
What we learned reading every model
FAQ
