Mistral Large 3 2512 vs OpenAI o3

Compare Mistral Large 3 2512 by Mistral AI against OpenAI o3 by OpenAI, tested across 54 shared challenges. Updated April 2026.

Which is better, Mistral Large 3 2512 or OpenAI o3?

Mistral Large 3 2512 and OpenAI o3 are both competitive models. Compare their real outputs side by side below.

Key Differences Between Mistral Large 3 2512 and OpenAI o3

Mistral Large 3 2512 is made by mistral while OpenAI o3 is from openai.

Our Verdict
Mistral Large 3 2512
Mistral Large 3 2512
OpenAI o3
OpenAI o3

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call
Writing DNA

Style Comparison

Similarity
94%

Mistral Large 3 2512 uses 49.8x more emoji

Mistral Large 3 2512
OpenAI o3
50%Vocabulary68%
20wSentence Length14w
0.48Hedging0.26
11.6Bold0.7
5.7Lists3.0
0.50Emoji0.00
1.18Headings0.38
0.06Transitions0.12
Based on 24 + 16 text responses
vs

Ask them anything yourself

Mistral Large 3 2512OpenAI o3

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

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