Claude Opus 4.5
No content available for this output.
Claude Opus 4.5 vs OpenAI o3
Compare Claude Opus 4.5 by Anthropic against OpenAI o3 by OpenAI, tested across 51 shared challenges. Updated February 2026.
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Claude Opus 4.5vsOpenAI o3
46 challenges
Why Claude Opus 4.5?
Leads 1 of 1 benchmarks
Stronger on SWE-bench Verified80.9% vs 69.1%
7 months newerNov 2025
Why OpenAI o3?
No standout advantages
Favorites
Claude Opus 4.5OpenAI o3
12 / 46
Estimate Complexityreasoning
Tests an AI's ability to make educated estimates based on technical knowledge
OpenAI o3
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
No content available for this output.
OpenAI o3
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.
OpenAI o3
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.
OpenAI o3
No content available for this output.
Vote
5 / 46
Stochastic Consistency Testanalysis
Tests an AI's randomness and creativity
Claude Opus 4.5
No content available for this output.
OpenAI o3
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
No content available for this output.
OpenAI o3
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
No content available for this output.
OpenAI o3
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.
OpenAI o3
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.
OpenAI o3
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.
OpenAI o3
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.
OpenAI o3
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
OpenAI o3
Vote
12 of 46