Claude Opus 4.5
No content available for this output.
Claude Opus 4.5 vs GPT-5 Nano
Compare Claude Opus 4.5 by Anthropic against GPT-5 Nano by OpenAI, tested across 46 shared challenges. Updated February 2026.
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Claude Opus 4.5vsGPT-5 Nano
46 challenges
Why Claude Opus 4.5?
Leads 1 of 1 benchmarks
Stronger on SWE-bench Verified80.9% vs 54.7%
4 months newerNov 2025
Why GPT-5 Nano?
No standout advantages
Favorites
Claude Opus 4.5GPT-5 Nano
12 / 46
Estimate Complexityreasoning
Tests an AI's ability to make educated estimates based on technical knowledge
GPT-5 Nano
No content available for this output.
Vote
2 / 46
AI Board Game Logicreasoning
Tests an AI's ability to understand game rules and strategy
Claude Opus 4.5
GPT-5 Nano
No content available for this output.
Vote
3 / 46
Logic Puzzlereasoning
Tests an AI's ability to solve a simple but potentially confusing logic puzzle
Claude Opus 4.5
No content available for this output.
GPT-5 Nano
No content available for this output.
Vote
4 / 46
Math Misconception Testreasoning
Tests an AI's understanding of number representation
Claude Opus 4.5
No content available for this output.
GPT-5 Nano
No content available for this output.
Vote
5 / 46
Stochastic Consistency Testanalysis
Tests an AI's randomness and creativity
Claude Opus 4.5
Here are 5 jokes:
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Why don't scientists trust atoms? Because they make up everything.
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What do you call a fish without eyes? A fsh.
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Why did the scarecrow win an award? Because he was outstanding in his field.
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I told my wife she was drawing her eyebrows too high. She looked surprised.
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What do you call a bear with no teeth? A gummy bear.
All 5 are unique - each joke has a different setup, punchline, and subject matter (atoms, fish, scarecrow, eyebrows, bear).
GPT-5 Nano
No content available for this output.
Vote
6 / 46
SVG Layout Challengeimage generation
Tests an AI's ability to generate vector graphics
Claude Opus 4.5
GPT-5 Nano
No content available for this output.
Vote
7 / 46
Xbox Controller SVG Artimage generation
Tests an AI's ability to create detailed SVG illustrations of gaming hardware
Claude Opus 4.5
GPT-5 Nano
No content available for this output.
Vote
8 / 46
Generate a Stand-Up Routineconversation
Tests an AI's humor and creative writing ability
Claude Opus 4.5
No content available for this output.
GPT-5 Nano
No content available for this output.
Vote
9 / 46
Realistic AI Interviewconversation
Tests an AI's ability to simulate personalities and predict future trends
Claude Opus 4.5
No content available for this output.
GPT-5 Nano
No content available for this output.
Vote
10 / 46
Satirical Fake News Headlineconversation
Tests an AI's humor and understanding of current events
Claude Opus 4.5
No content available for this output.
GPT-5 Nano
No content available for this output.
Vote
11 / 46
Character Voice Testconversation
Tests an AI's ability to write in distinct character voices
Claude Opus 4.5
No content available for this output.
GPT-5 Nano
No content available for this output.
Vote
12 / 46
Minimalist Landing Pageweb design
Tests an AI's ability to generate a complete, working landing page
Claude Opus 4.5
GPT-5 Nano
Vote
12 of 46