GPT-5.1 Codex Max
No content available for this output.
GPT-5.1 Codex Max vs Claude Opus 4
Compare GPT-5.1 Codex Max by OpenAI against Claude Opus 4 by Anthropic, tested across 34 shared challenges. Updated February 2026.
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GPT-5.1 Codex MaxvsClaude Opus 4
34 challenges
Why GPT-5.1 Codex Max?
Leads 1 of 1 benchmarks
Stronger on SWE-bench Verified77.9% vs 72.5%
7 months newerDec 2025
Why Claude Opus 4?
No standout advantages
Favorites
GPT-5.1 Codex MaxClaude Opus 4
12 / 34
Logic Puzzlereasoning
Tests an AI's ability to solve a simple but potentially confusing logic puzzle
Claude Opus 4
I need to work through this step-by-step.
Given information:
- Sally is a girl
- Sally has 3 brothers
- Each brother has 2 sisters
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:
- Sally
- One other sister
Therefore, Sally has 1 sister.
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2 / 34
Stochastic Consistency Testanalysis
Tests an AI's randomness and creativity
GPT-5.1 Codex Max
No content available for this output.
Claude Opus 4
Here are 5 jokes:
-
Why don't scientists trust atoms? Because they make up everything!
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What do you call a bear with no teeth? A gummy bear!
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Why did the scarecrow win an award? He was outstanding in his field!
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What do you call a fake noodle? An impasta!
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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).
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3 / 34
SVG Layout Challengeimage generation
Tests an AI's ability to generate vector graphics
GPT-5.1 Codex Max
No content available for this output.
Claude Opus 4
Vote
4 / 34
Xbox Controller SVG Artimage generation
Tests an AI's ability to create detailed SVG illustrations of gaming hardware
GPT-5.1 Codex Max
No content available for this output.
Claude Opus 4
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5 / 34
Generate a Stand-Up Routineconversation
Tests an AI's humor and creative writing ability
GPT-5.1 Codex Max
No content available for this output.
Claude Opus 4
No content available for this output.
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6 / 34
Pokémon Battle UI Recreationweb design
Recreate an interactive, nostalgic Pokémon battle UI in a single HTML file.
GPT-5.1 Codex Max
No content available for this output.
Claude Opus 4
No content available for this output.
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7 / 34
Mario Level UI Recreationweb design
Recreate an interactive, classic Mario level in a single HTML file.
GPT-5.1 Codex Max
No content available for this output.
Claude Opus 4
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8 / 34
Linear App Cloneweb design
Tests an AI's ability to replicate an existing UI with Tailwind CSS
GPT-5.1 Codex Max
No content available for this output.
Claude Opus 4
No content available for this output.
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9 / 34
Interactive Catan Boardweb design
Tests an AI's ability to create interactive web elements
GPT-5.1 Codex Max
No content available for this output.
Claude Opus 4
No content available for this output.
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10 / 34
World Map SVGimage generation
Tests an AI's ability to create a detailed world map in SVG format
GPT-5.1 Codex Max
No content available for this output.
Claude Opus 4
No content available for this output.
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11 / 34
Random Tailwind Webappweb design
Generate a single-page, self-contained HTML webapp using Tailwind CSS for a randomly chosen category/industry/niche.
GPT-5.1 Codex Max
No content available for this output.
Claude Opus 4
No content available for this output.
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12 / 34
Surprise Animal SVGimage generation
Generate SVG art of a randomly chosen animal in a setting of its choosing.
GPT-5.1 Codex Max
No content available for this output.
Claude Opus 4
No content available for this output.
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12 of 34