GPT-5.1 Codex Max
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GPT-5.1 Codex Max vs Kimi K2
Compare GPT-5.1 Codex Max by OpenAI against Kimi K2 by Moonshot AI, tested across 35 shared challenges. Updated February 2026.
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GPT-5.1 Codex MaxvsKimi K2
35 challenges
Why GPT-5.1 Codex Max?
Leads 1 of 1 benchmarks
Stronger on SWE-bench Verified77.9% vs 65.8%
5 months newerDec 2025
Why Kimi K2?
No standout advantages
Favorites
GPT-5.1 Codex MaxKimi K2
12 / 35
Estimate Complexityreasoning
Tests an AI's ability to make educated estimates based on technical knowledge
Kimi K2
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2 / 35
Logic Puzzlereasoning
Tests an AI's ability to solve a simple but potentially confusing logic puzzle
GPT-5.1 Codex Max
No content available for this output.
Kimi K2
No content available for this output.
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3 / 35
Math Misconception Testreasoning
Tests an AI's understanding of number representation
GPT-5.1 Codex Max
No content available for this output.
Kimi K2
No content available for this output.
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4 / 35
Stochastic Consistency Testanalysis
Tests an AI's randomness and creativity
GPT-5.1 Codex Max
No content available for this output.
Kimi K2
No content available for this output.
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5 / 35
Generate a Stand-Up Routineconversation
Tests an AI's humor and creative writing ability
GPT-5.1 Codex Max
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Kimi K2
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6 / 35
Realistic AI Interviewconversation
Tests an AI's ability to simulate personalities and predict future trends
GPT-5.1 Codex Max
No content available for this output.
Kimi K2
No content available for this output.
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7 / 35
Satirical Fake News Headlineconversation
Tests an AI's humor and understanding of current events
GPT-5.1 Codex Max
No content available for this output.
Kimi K2
No content available for this output.
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8 / 35
Character Voice Testconversation
Tests an AI's ability to write in distinct character voices
GPT-5.1 Codex Max
No content available for this output.
Kimi K2
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9 / 35
Minimalist Landing Pageweb design
Tests an AI's ability to generate a complete, working landing page
GPT-5.1 Codex Max
Kimi K2
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10 / 35
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.
Kimi K2
No content available for this output.
Vote
11 / 35
Mario Level UI Recreationweb design
Recreate an interactive, classic Mario level in a single HTML file.
GPT-5.1 Codex Max
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Kimi K2
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Sponsored
12 / 35
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.
Kimi K2
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12 of 35