Claude 3.7 Sonnet vs o3 Mini

Compare Claude 3.7 Sonnet by Anthropic against o3 Mini by OpenAI, in 1 community votes, o3 mini wins 100% of head-to-head duels, context windows of 200K vs 64K, tested across 54 shared challenges. Updated April 2026.

Which is better, Claude 3.7 Sonnet or o3 Mini?

o3 Mini is the better choice overall, winning 100% of 1 blind community votes on Rival. Claude 3.7 Sonnet costs $3/M input tokens vs $1.1/M for o3 Mini. Context windows: 200K vs 64K tokens. Compare their real outputs side by side below.

Key Differences Between Claude 3.7 Sonnet and o3 Mini

Claude 3.7 Sonnet is made by anthropic while o3 Mini is from openai. Claude 3.7 Sonnet has a 200K token context window compared to o3 Mini's 64K. On pricing, Claude 3.7 Sonnet costs $3/M input tokens vs $1.1/M for o3 Mini. In community voting, In 1 community votes, o3 Mini wins 100% of head-to-head duels.

In 1 community votes, o3 Mini wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 1+ human preference judgments for this pair.

Our Verdict
o3 Mini
o3 MiniWinner
Claude 3.7 Sonnet
Claude 3.7 SonnetRunner-up

Pick o3 Mini. In 1 blind votes, o3 Mini wins 100% of the time. That's not luck.

o3 Mini is 3.4x cheaper per token — worth considering if cost matters.

Clear winner
Writing DNA

Style Comparison

Similarity
87%

Claude 3.7 Sonnet uses 3.8x more headings

Claude 3.7 Sonnet
o3 Mini
62%Vocabulary65%
35wSentence Length17w
0.99Hedging0.74
1.2Bold3.9
4.3Lists1.7
0.00Emoji0.00
1.78Headings0.47
0.23Transitions0.38
Based on 13 + 12 text responses
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Claude 3.7 Sonneto3 Mini

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