Compare Claude Opus 4 by Anthropic against Gemini 3.1 Pro Preview by Google AI, context windows of 200K vs 1.0M, tested across 35 shared challenges. Updated April 2026.
Claude Opus 4 and Gemini 3.1 Pro Preview are both competitive models. Claude Opus 4 costs $15/M input tokens vs $2/M for Gemini 3.1 Pro Preview. Context windows: 200K vs 1049K tokens. Compare their real outputs side by side below.
Claude Opus 4 is made by anthropic while Gemini 3.1 Pro Preview is from google. Claude Opus 4 has a 200K token context window compared to Gemini 3.1 Pro Preview's 1049K. On pricing, Claude Opus 4 costs $15/M input tokens vs $2/M for Gemini 3.1 Pro Preview.
No community votes yet. On paper, Gemini 3.1 Pro Preview has the edge — newer, bigger context window.
Gemini 3.1 Pro Preview is 6.3x 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.
35 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.
Tests an AI's randomness and creativity
Here are 5 jokes:
Why don't scientists trust atoms? Because they make up everything!
What do you call a bear with no teeth? A gummy bear!
Why did the scarecrow win an award? He was outstanding in his field!
What do you call a fake noodle? An impasta!
Why don't eggs tell jokes? They'd crack up!
All 5 jokes are unique - each one has a different setup and punchline, covering different topics (atoms/scie nce, bears, scarecrows, pasta, and eggs).
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.
Create a 3D building and driving game in a single self-contained HTML file using Three.js. Tests an AI's ability to combine 3D graphics, game logic, and UI interactions on the web.
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.
23+ more head-to-head results. Free. Not a trick.
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