Claude Opus 4.1
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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 25 shared challenges. Updated April 2026.
Which is better, Claude Opus 4.1 or GPT-5 Codex?
Claude Opus 4.1 is the better choice overall, winning 62% of 66 blind community votes on Rival. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4.1 and GPT-5 Codex
Claude Opus 4.1 is made by anthropic while GPT-5 Codex is from openai. In community voting, In 66 community votes, Claude Opus 4.1 wins 62% of head-to-head duels.
In 66 community votes, Claude Opus 4.1 wins 62% of head-to-head duels. Claude Opus 4.1 leads in Web Design, Analysis, Conversation, while GPT-5 Codex leads in Image Generation, Reasoning. Based on blind community voting from the Rival open dataset of 66+ human preference judgments for this pair.
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
Writing DNA
Style Comparison
Similarity
93%
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
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