Claude Opus 4 vs OpenAI o3
Compare Claude Opus 4 by Anthropic against OpenAI o3 by OpenAI, in 42 community votes, claude opus 4 wins 72% of head-to-head duels, tested across 53 shared challenges. Updated May 2026.
Which is better, Claude Opus 4 or OpenAI o3?
Claude Opus 4 is the better choice overall, winning 72% of 42 blind community votes on Rival. Claude Opus 4 costs $15/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4 and OpenAI o3
Claude Opus 4 is made by anthropic while OpenAI o3 is from openai. On pricing, Claude Opus 4 costs $15/M input tokens vs $10/M for OpenAI o3. In community voting, In 42 community votes, Claude Opus 4 wins 72% of head-to-head duels.
In 42 community votes, Claude Opus 4 wins 72% of head-to-head duels. Claude Opus 4 leads in Web Design, Image Generation, while OpenAI o3 leads in Reasoning. Based on blind community voting from the Rival open dataset of 42+ human preference judgments for this pair.
Per 1M tokens
OpenAI o3 is cheaper on both — 1.5× input, 1.9× output
Pick Claude Opus 4. In 42 blind votes, Claude Opus 4 wins 72% of the time. That's not luck.
Pick Claude Opus 4 for Image Generation, Web Design. Pick OpenAI o3 for Reasoning.
Style Comparison
Claude Opus 4 uses 11.2x more emoji
