Claude Sonnet 4 vs OpenAI o3
Compare Claude Sonnet 4 by Anthropic against OpenAI o3 by OpenAI, in 9 community votes, claude sonnet 4 wins 83% of head-to-head duels, tested across 54 shared challenges. Updated May 2026.
Which is better, Claude Sonnet 4 or OpenAI o3?
Claude Sonnet 4 is the better choice overall, winning 83% of 9 blind community votes on Rival. Claude Sonnet 4 costs $3/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 4 and OpenAI o3
Claude Sonnet 4 is made by anthropic while OpenAI o3 is from openai. On pricing, Claude Sonnet 4 costs $3/M input tokens vs $10/M for OpenAI o3. In community voting, In 9 community votes, Claude Sonnet 4 wins 83% of head-to-head duels.
In 9 community votes, Claude Sonnet 4 wins 83% of head-to-head duels. Claude Sonnet 4 leads in Planning. Based on blind community voting from the Rival open dataset of 9+ human preference judgments for this pair.
Per 1M tokens
Claude Sonnet 4 is cheaper on both — 3.3× input, 2.7× output
Pick Claude Sonnet 4. In 9 blind votes, Claude Sonnet 4 wins 83% of the time. That's not luck.
Claude Sonnet 4 particularly excels in Planning.
Style Comparison
Claude Sonnet 4 uses 87.9x more emoji
