Claude Opus 4.1
Nothing here. The model returned empty. We stared at it for a while.
Claude Opus 4.1 vs GPT-5 Nano
Compare Claude Opus 4.1 by Anthropic against GPT-5 Nano by OpenAI, in 4 community votes, claude opus 4.1 wins 75% of head-to-head duels, tested across 25 shared challenges. Updated April 2026.
Which is better, Claude Opus 4.1 or GPT-5 Nano?
Claude Opus 4.1 is the better choice overall, winning 75% of 4 blind community votes on Rival. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4.1 and GPT-5 Nano
Claude Opus 4.1 is made by anthropic while GPT-5 Nano is from openai. In community voting, In 4 community votes, Claude Opus 4.1 wins 75% of head-to-head duels.
In 4 community votes, Claude Opus 4.1 wins 75% of head-to-head duels. Based on blind community voting from the Rival open dataset of 4+ human preference judgments for this pair.
Our Verdict
Claude Opus 4.1Winner
GPT-5 NanoRunner-up
Pick Claude Opus 4.1. In 4 blind votes, Claude Opus 4.1 wins 75% of the time. That's not luck.
Clear winner
Writing DNA
Style Comparison
Similarity
100%
Claude Opus 4.1 uses 509.5x more bold
Claude Opus 4.1
GPT-5 Nano
61%Vocabulary59%
87wSentence Length25w
0.54Hedging0.23
5.1Bold0.0
6.7Lists4.2
0.38Emoji0.00
1.68Headings0.00
0.13Transitions0.01
Based on 17 + 14 text responses
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