Mistral Devstral Medium
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Mistral Devstral Medium vs GPT-5 Codex
Compare Mistral Devstral Medium by Mistral AI against GPT-5 Codex by OpenAI, tested across 44 shared challenges. Updated February 2026.
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Mistral Devstral MediumvsGPT-5 Codex
39 challenges
Why Mistral Devstral Medium?
No standout advantages
Why GPT-5 Codex?
Leads 1 of 1 benchmarks
Stronger on SWE-bench Verified74.5% vs 61.6%
2 months newerSep 2025
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Mistral Devstral MediumGPT-5 Codex
12 / 39
Estimate Complexityreasoning
Tests an AI's ability to make educated estimates based on technical knowledge
GPT-5 Codex
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2 / 39
Logic Puzzlereasoning
Tests an AI's ability to solve a simple but potentially confusing logic puzzle
Mistral Devstral Medium
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GPT-5 Codex
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3 / 39
Math Misconception Testreasoning
Tests an AI's understanding of number representation
Mistral Devstral Medium
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GPT-5 Codex
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4 / 39
Stochastic Consistency Testanalysis
Tests an AI's randomness and creativity
Mistral Devstral Medium
Sure, here are five jokes for you:
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Why don't scientists trust atoms? Because they make up everything!
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What do you call fake spaghetti? An impasta.
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How does the moon cut his hair? Eclipse it.
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What do you call a can opener that doesn't work? A can't opener.
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How many tickles does it take to make an octopus laugh? Ten-tickles.
All five jokes are unique.
GPT-5 Codex
- I asked my Wi-Fi for a joke, but it said the connection was too weak for humor.
- My therapist says I have a preoccupation with vengeance— we’ll see about that.
- I tried to start a hot air balloon business, but it never really took off.
- I told my coffee it was grounded, now it won’t espresso itself.
- I asked the librarian if the library had books on paranoia—she whispered, “They’re right behind you.”
Unique jokes: 5
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5 / 39
SVG Layout Challengeimage generation
Tests an AI's ability to generate vector graphics
Mistral Devstral Medium
GPT-5 Codex
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6 / 39
Xbox Controller SVG Artimage generation
Tests an AI's ability to create detailed SVG illustrations of gaming hardware
Mistral Devstral Medium
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GPT-5 Codex
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7 / 39
Realistic AI Interviewconversation
Tests an AI's ability to simulate personalities and predict future trends
Mistral Devstral Medium
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GPT-5 Codex
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8 / 39
Satirical Fake News Headlineconversation
Tests an AI's humor and understanding of current events
Mistral Devstral Medium
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GPT-5 Codex
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9 / 39
Character Voice Testconversation
Tests an AI's ability to write in distinct character voices
Mistral Devstral Medium
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GPT-5 Codex
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10 / 39
Minimalist Landing Pageweb design
Tests an AI's ability to generate a complete, working landing page
Mistral Devstral Medium
GPT-5 Codex
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11 / 39
Pokémon Battle UI Recreationweb design
Recreate an interactive, nostalgic Pokémon battle UI in a single HTML file.
Mistral Devstral Medium
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GPT-5 Codex
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12 / 39
Mario Level UI Recreationweb design
Recreate an interactive, classic Mario level in a single HTML file.
Mistral Devstral Medium
GPT-5 Codex
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12 of 39