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Claude Opus 4.1 vs GPT-5

Compare Claude Opus 4.1 by Anthropic against GPT-5 by OpenAI, in 104 community votes, claude opus 4.1 wins 58% of head-to-head duels, context windows of 200K vs 400K, tested across 27 shared challenges. Updated April 2026.

Which is better, Claude Opus 4.1 or GPT-5?

Claude Opus 4.1 is the better choice overall, winning 58% of 104 blind community votes on Rival. Claude Opus 4.1 costs $15/M input tokens vs $1.25/M for GPT-5. Context windows: 200K vs 400K tokens. Compare their real outputs side by side below.

Key Differences Between Claude Opus 4.1 and GPT-5

Claude Opus 4.1 is made by anthropic while GPT-5 is from openai. Claude Opus 4.1 has a 200K token context window compared to GPT-5's 400K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $1.25/M for GPT-5. In community voting, In 104 community votes, Claude Opus 4.1 wins 58% of head-to-head duels.

In 104 community votes, Claude Opus 4.1 wins 58% of head-to-head duels. Claude Opus 4.1 leads in Web Design, Conversation, while GPT-5 leads in Image Generation, Reasoning, Analysis. Based on blind community voting from the Rival open dataset of 104+ human preference judgments for this pair.

Web Design: Claude Opus 4.1 wins 95% of votes
Image Generation: GPT-5 wins 71% of votes
Reasoning: GPT-5 wins 100% of votes
Conversation: Claude Opus 4.1 wins 86% of votes
Analysis: GPT-5 wins 100% of votes
Our Verdict
Claude Opus 4.1
Claude Opus 4.1Winner
GPT-5
GPT-5Runner-up

Pick Claude Opus 4.1. In 104 blind votes, Claude Opus 4.1 wins 58% of the time. That's not luck.

Pick Claude Opus 4.1 for Web Design, Conversation. Pick GPT-5 for Reasoning, Analysis, Image Generation. GPT-5 is 7.5x cheaper per token — worth considering if cost matters.

Clear winner
Writing DNA

Style Comparison

Similarity
91%

Claude Opus 4.1 uses 38.4x more emoji

Claude Opus 4.1
GPT-5
61%Vocabulary65%
87wSentence Length13w
0.54Hedging0.20
5.1Bold0.2
6.7Lists4.6
0.38Emoji0.00
1.68Headings0.16
0.13Transitions0.03
Based on 17 + 16 text responses
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Claude Opus 4.1GPT-5

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AI Hallucination Index 2026
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