Claude 3.7 Sonnet
Nothing here. The model returned empty. We stared at it for a while.
Claude 3.7 Sonnet vs OpenAI o3
Compare Claude 3.7 Sonnet by Anthropic against OpenAI o3 by OpenAI, in 35 community votes, openai o3 wins 59% of head-to-head duels, tested across 54 shared challenges. Updated April 2026.
Which is better, Claude 3.7 Sonnet or OpenAI o3?
OpenAI o3 is the better choice overall, winning 59% of 35 blind community votes on Rival. Claude 3.7 Sonnet costs $3/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.
Key Differences Between Claude 3.7 Sonnet and OpenAI o3
Claude 3.7 Sonnet is made by anthropic while OpenAI o3 is from openai. On pricing, Claude 3.7 Sonnet costs $3/M input tokens vs $10/M for OpenAI o3. In community voting, In 35 community votes, OpenAI o3 wins 59% of head-to-head duels.
In 35 community votes, OpenAI o3 wins 59% of head-to-head duels. Claude 3.7 Sonnet leads in Web Design, Image Generation, while OpenAI o3 leads in Reasoning, Conversation. Based on blind community voting from the Rival open dataset of 35+ human preference judgments for this pair.
Web Design: Claude 3.7 Sonnet wins 60% of votes
Image Generation: Claude 3.7 Sonnet wins 57% of votes
Reasoning: OpenAI o3 wins 75% of votes
Conversation: OpenAI o3 wins 100% of votes
Our Verdict
OpenAI o3Winner
Claude 3.7 SonnetRunner-up
Pick OpenAI o3. In 35 blind votes, OpenAI o3 wins 59% of the time. That's not luck.
Pick Claude 3.7 Sonnet for Web Design, Image Generation. Pick OpenAI o3 for Conversation, Reasoning.
Clear winner
Writing DNA
Style Comparison
Similarity
93%
Claude 3.7 Sonnet uses 4.7x more headings
Claude 3.7 Sonnet
OpenAI o3
62%Vocabulary68%
35wSentence Length14w
0.99Hedging0.26
1.2Bold0.7
4.3Lists3.0
0.00Emoji0.00
1.78Headings0.38
0.23Transitions0.12
Based on 13 + 16 text responses
vsAsk them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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