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
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
Model Similarity Index
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
Devstral M / S
95.7%
Qwen3 Coder / Flash
95.6%
GPT-5.4 / Mini
93.3%
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
Free preview13 of 58 slides
FAQ