Claude Opus 4 vs Gemini 2.5 Pro (I/O Edition)
Compare Claude Opus 4 by Anthropic against Gemini 2.5 Pro (I/O Edition) by Google AI, in 45 community votes, claude opus 4 and gemini 2.5 pro (i/o edition) are closely matched, tested across 40 shared challenges. Updated May 2026.
Which is better, Claude Opus 4 or Gemini 2.5 Pro (I/O Edition)?
Claude Opus 4 and Gemini 2.5 Pro (I/O Edition) are closely matched based on 45 community votes. Claude Opus 4 costs $15/M input tokens vs $1.25/M for Gemini 2.5 Pro (I/O Edition). Compare their real outputs side by side below.
Key Differences Between Claude Opus 4 and Gemini 2.5 Pro (I/O Edition)
Claude Opus 4 is made by anthropic while Gemini 2.5 Pro (I/O Edition) is from google. On pricing, Claude Opus 4 costs $15/M input tokens vs $1.25/M for Gemini 2.5 Pro (I/O Edition). In community voting, In 45 community votes, Claude Opus 4 and Gemini 2.5 Pro (I/O Edition) are closely matched.
In 45 community votes, Claude Opus 4 and Gemini 2.5 Pro (I/O Edition) are closely matched. Claude Opus 4 leads in Web Design, Conversation, while Gemini 2.5 Pro (I/O Edition) leads in Image Generation. Based on blind community voting from the Rival open dataset of 45+ human preference judgments for this pair.
Per 1M tokens
Gemini 2.5 Pro (I/O Edition) is cheaper on both — 12× input, 7.5× output
Too close to call. Pick based on your use case.
Pick Claude Opus 4 for Conversation, Web Design. Pick Gemini 2.5 Pro (I/O Edition) for Image Generation. Gemini 2.5 Pro (I/O Edition) is 7.5x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Opus 4 uses 11.2x more emoji
