Claude Opus 4.1 vs Claude Opus 4

Compare Claude Opus 4.1 and Claude Opus 4, both from Anthropic, in 19 community votes, claude opus 4 wins 56% of head-to-head duels, context windows of 200K vs 200K, tested across 22 shared challenges. Updated April 2026.

Which is better, Claude Opus 4.1 or Claude Opus 4?

Claude Opus 4 is the better choice overall, winning 56% of 19 blind community votes on Rival. Claude Opus 4.1 costs $15/M input tokens vs $15/M for Claude Opus 4. Context windows: 200K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between Claude Opus 4.1 and Claude Opus 4

Claude Opus 4.1 is made by anthropic while Claude Opus 4 is from anthropic. Claude Opus 4.1 has a 200K token context window compared to Claude Opus 4's 200K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $15/M for Claude Opus 4. In community voting, In 19 community votes, Claude Opus 4 wins 56% of head-to-head duels.

In 19 community votes, Claude Opus 4 wins 56% of head-to-head duels. Claude Opus 4 leads in Image Generation. Based on blind community voting from the Rival open dataset of 19+ human preference judgments for this pair.

Image Generation: Claude Opus 4 wins 67% of votes
Web Design: Claude Opus 4.1 and Claude Opus 4 are tied
Our Verdict
Claude Opus 4
Claude Opus 4Winner
Claude Opus 4.1
Claude Opus 4.1Runner-up

Claude Opus 4 has the edge overall. In 19 blind votes, Claude Opus 4 wins 56% of the time.

Claude Opus 4 particularly excels in Image Generation.

Slight edge
Writing DNA

Style Comparison

Similarity
100%

Claude Opus 4.1 uses 3.4x more emoji

Claude Opus 4.1
Claude Opus 4
61%Vocabulary64%
87wSentence Length62w
0.54Hedging0.52
5.1Bold4.4
6.7Lists9.1
0.38Emoji0.11
1.68Headings1.87
0.13Transitions0.27
Based on 17 + 16 text responses
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Claude Opus 4.1Claude Opus 4

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