GPT-5 Codex vs Mistral Large 2

Compare GPT-5 Codex by OpenAI against Mistral Large 2 by Mistral AI, tested across 17 shared challenges. Updated April 2026.

Which is better, GPT-5 Codex or Mistral Large 2?

GPT-5 Codex and Mistral Large 2 are both competitive models. Compare their real outputs side by side below.

Key Differences Between GPT-5 Codex and Mistral Large 2

GPT-5 Codex is made by openai while Mistral Large 2 is from mistral.

Our Verdict
GPT-5 Codex
GPT-5 Codex
Mistral Large 2
Mistral Large 2Runner-up

No community votes yet. On paper, GPT-5 Codex has the edge — bigger model tier, newer, major provider backing.

Slight edge
Writing DNA

Style Comparison

Similarity
95%

GPT-5 Codex uses 5.5x more transitions

GPT-5 Codex
Mistral Large 2
64%Vocabulary43%
17wSentence Length21w
0.38Hedging0.39
2.3Bold14.4
3.5Lists7.4
0.15Emoji0.80
0.49Headings1.41
0.05Transitions0.01
Based on 13 + 10 text responses
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Ask them anything yourself

GPT-5 CodexMistral Large 2

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
FAQ

Common questions