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Claude Opus 4 vs Claude Sonnet 4

Compare Claude Opus 4 and Claude Sonnet 4, both from Anthropic, in 258 community votes, claude opus 4 wins 65% of head-to-head duels, context windows of 200K vs 200K, tested across 33 shared challenges. Updated April 2026.

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

Claude Opus 4 is the better choice overall, winning 65% of 258 blind community votes on Rival. Claude Opus 4 costs $15/M input tokens vs $3/M for Claude Sonnet 4. Context windows: 200K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between Claude Opus 4 and Claude Sonnet 4

Claude Opus 4 is made by anthropic while Claude Sonnet 4 is from anthropic. Claude Opus 4 has a 200K token context window compared to Claude Sonnet 4's 200K. On pricing, Claude Opus 4 costs $15/M input tokens vs $3/M for Claude Sonnet 4. In community voting, In 258 community votes, Claude Opus 4 wins 65% of head-to-head duels.

In 258 community votes, Claude Opus 4 wins 65% of head-to-head duels. Claude Opus 4 leads in Web Design, Reasoning, Analysis. Based on blind community voting from the Rival open dataset of 258+ human preference judgments for this pair.

Web Design: Claude Opus 4 wins 66% of votes
Image Generation: Claude Opus 4 and Claude Sonnet 4 are tied
Reasoning: Claude Opus 4 wins 73% of votes
Analysis: Claude Opus 4 wins 75% of votes
Conversation: Claude Opus 4 and Claude Sonnet 4 are tied
Planning: Claude Opus 4 and Claude Sonnet 4 are tied
Our Verdict
Claude Opus 4
Claude Opus 4Winner
Claude Sonnet 4
Claude Sonnet 4Runner-up

Pick Claude Opus 4. In 258 blind votes, Claude Opus 4 wins 65% of the time. That's not luck.

Claude Opus 4 particularly excels in Analysis, Reasoning, Web Design. Claude Sonnet 4 is 5.0x cheaper per token — worth considering if cost matters.

Clear winner
Writing DNA

Style Comparison

Similarity
100%

Claude Sonnet 4 uses 7.9x more emoji

Claude Opus 4
Claude Sonnet 4
64%Vocabulary62%
62wSentence Length111w
0.52Hedging0.40
4.4Bold5.0
9.1Lists9.3
0.11Emoji0.88
1.87Headings2.16
0.27Transitions0.33
Based on 16 + 17 text responses
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Claude Opus 4Claude Sonnet 4

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AI Hallucination Index 2026
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