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Claude 3.7 Sonnet vs Claude Sonnet 4.5

Compare Claude 3.7 Sonnet and Claude Sonnet 4.5, both from Anthropic, in 21 community votes, claude sonnet 4.5 wins 80% of head-to-head duels, context windows of 200K vs 200K, tested across 43 shared challenges. Updated April 2026.

Which is better, Claude 3.7 Sonnet or Claude Sonnet 4.5?

Claude Sonnet 4.5 is the better choice overall, winning 80% of 21 blind community votes on Rival. Claude 3.7 Sonnet costs $3/M input tokens vs $3/M for Claude Sonnet 4.5. Context windows: 200K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between Claude 3.7 Sonnet and Claude Sonnet 4.5

Claude 3.7 Sonnet is made by anthropic while Claude Sonnet 4.5 is from anthropic. Claude 3.7 Sonnet has a 200K token context window compared to Claude Sonnet 4.5's 200K. On pricing, Claude 3.7 Sonnet costs $3/M input tokens vs $3/M for Claude Sonnet 4.5. In community voting, In 21 community votes, Claude Sonnet 4.5 wins 80% of head-to-head duels.

In 21 community votes, Claude Sonnet 4.5 wins 80% of head-to-head duels. Claude Sonnet 4.5 leads in Web Design, Image Generation, Reasoning. Based on blind community voting from the Rival open dataset of 21+ human preference judgments for this pair.

Web Design: Claude Sonnet 4.5 wins 70% of votes
Image Generation: Claude Sonnet 4.5 wins 88% of votes
Reasoning: Claude Sonnet 4.5 wins 100% of votes
Our Verdict
Claude Sonnet 4.5
Claude Sonnet 4.5Winner
Claude 3.7 Sonnet
Claude 3.7 SonnetRunner-up

Pick Claude Sonnet 4.5. In 21 blind votes, Claude Sonnet 4.5 wins 80% of the time. That's not luck.

Claude Sonnet 4.5 particularly excels in Reasoning, Image Generation, Web Design.

Clear winner
Writing DNA

Style Comparison

Similarity
100%

Claude Sonnet 4.5 uses 45.2x more emoji

Claude 3.7 Sonnet
Claude Sonnet 4.5
62%Vocabulary64%
35wSentence Length94w
0.99Hedging0.48
1.2Bold4.9
4.3Lists8.0
0.00Emoji0.45
1.78Headings1.91
0.23Transitions0.07
Based on 13 + 20 text responses
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Claude 3.7 SonnetClaude Sonnet 4.5

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AI Hallucination Index 2026
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