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 27 shared challenges. Updated April 2026.
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.
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.
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.
Claude Opus 4 uses 11.2x more emoji
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.
27 fights queued
Tests an AI's ability to solve a simple but potentially confusing logic puzzle
I need to work through this step-by-step.
Given information:
Since Sally is one of the sisters that each brother has, and each brother has 2 sisters total, that means th ere must be exactly 2 sisters in the family.
The 2 sisters are:
Therefore, Sally has 1 sister.
Let's break this down:
So, Sally has 1 sister.
Tests an AI's randomness and creativity
Tests an AI's ability to generate vector graphics
Tests an AI's ability to create detailed SVG illustrations of gaming hardware
Tests an AI's humor and creative writing ability
Recreate an interactive, nostalgic Pokémon battle UI in a single HTML file.
Recreate an interactive, classic Mario level in a single HTML file.
Tests an AI's ability to replicate an existing UI with Tailwind CSS
Tests an AI's ability to create interactive web elements
Tests an AI's ability to create a detailed world map in SVG format
Generate a single-page, self-contained HTML webapp using Tailwind CSS for a randomly chosen category/industry/niche.
Generate SVG art of a randomly chosen animal in a setting of its choosing.
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