Compare Claude Opus 4 by Anthropic against GPT-4.5 by OpenAI, in 90 community votes, claude opus 4 wins 85% of head-to-head duels, context windows of 200K vs 128K, tested across 17 shared challenges. Updated February 2026.
In 90 community votes, Claude Opus 4 wins 85% of head-to-head duels. Claude Opus 4 leads in Web Design, Image Generation, Conversation. Based on blind community voting from the RIVAL open dataset of 90+ human preference judgments for this pair.
17 challenges
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.
Sally has 1 sister.
Explanation:
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.
Generate a unique and simple recipe with common ingredients.
