Claude Opus 4.1 vs Gemini 2.5 Pro (I/O Edition)
Compare Claude Opus 4.1 by Anthropic against Gemini 2.5 Pro (I/O Edition) by Google AI, in 10 community votes, claude opus 4.1 wins 56% of head-to-head duels, tested across 40 shared challenges. Updated April 2026.
Which is better, Claude Opus 4.1 or Gemini 2.5 Pro (I/O Edition)?
Claude Opus 4.1 is the better choice overall, winning 56% of 10 blind community votes on Rival. Claude Opus 4.1 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 4.1 and Gemini 2.5 Pro (I/O Edition)
Claude Opus 4.1 is made by anthropic while Gemini 2.5 Pro (I/O Edition) is from google. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $1.25/M for Gemini 2.5 Pro (I/O Edition). In community voting, In 10 community votes, Claude Opus 4.1 wins 56% of head-to-head duels.
In 10 community votes, Claude Opus 4.1 wins 56% of head-to-head duels. Claude Opus 4.1 leads in Web Design, while Gemini 2.5 Pro (I/O Edition) leads in Image Generation. Based on blind community voting from the Rival open dataset of 10+ human preference judgments for this pair.
Claude Opus 4.1 has the edge overall. In 10 blind votes, Claude Opus 4.1 wins 56% of the time.
Pick Claude Opus 4.1 for 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 4.1 uses 38.4x more emoji
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
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12
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32
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279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
