GPT-5.1-Codex vs Mistral Large 2
Compare GPT-5.1-Codex by OpenAI against Mistral Large 2 by Mistral AI, context windows of 400K vs 128K, tested across 18 shared challenges. Updated April 2026.
Which is better, GPT-5.1-Codex or Mistral Large 2?
GPT-5.1-Codex and Mistral Large 2 are both competitive models. GPT-5.1-Codex costs $1.25/M input tokens vs $8/M for Mistral Large 2. Context windows: 400K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.1-Codex and Mistral Large 2
GPT-5.1-Codex is made by openai while Mistral Large 2 is from mistral. GPT-5.1-Codex has a 400K token context window compared to Mistral Large 2's 128K. On pricing, GPT-5.1-Codex costs $1.25/M input tokens vs $8/M for Mistral Large 2.
Our Verdict
GPT-5.1-Codex
Mistral Large 2Runner-up
No community votes yet. On paper, GPT-5.1-Codex has the edge — bigger model tier, newer, bigger context window, major provider backing.
Slight edge
Writing DNA
Style Comparison
Similarity
96%
Mistral Large 2 uses 79.6x more emoji
GPT-5.1-Codex
Mistral Large 2
70%Vocabulary43%
17wSentence Length21w
0.39Hedging0.39
3.4Bold14.4
3.5Lists7.4
0.00Emoji0.80
0.50Headings1.41
0.38Transitions0.01
Based on 14 + 10 text responses
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279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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