OpenAI o4 Mini High vs Mistral Medium 3

Compare OpenAI o4 Mini High by OpenAI against Mistral Medium 3 by Mistral AI, context windows of 200K vs 131K, tested across 25 shared challenges. Updated April 2026.

Which is better, OpenAI o4 Mini High or Mistral Medium 3?

OpenAI o4 Mini High and Mistral Medium 3 are both competitive models. OpenAI o4 Mini High costs $1.1/M input tokens vs $0.4/M for Mistral Medium 3. Context windows: 200K vs 131K tokens. Compare their real outputs side by side below.

Key Differences Between OpenAI o4 Mini High and Mistral Medium 3

OpenAI o4 Mini High is made by openai while Mistral Medium 3 is from mistral. OpenAI o4 Mini High has a 200K token context window compared to Mistral Medium 3's 131K. On pricing, OpenAI o4 Mini High costs $1.1/M input tokens vs $0.4/M for Mistral Medium 3.

Our Verdict
OpenAI o4 Mini High
OpenAI o4 Mini High
Mistral Medium 3
Mistral Medium 3

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
66%

Mistral Medium 3 uses 859.1x more bold

OpenAI o4 Mini High
Mistral Medium 3
70%Vocabulary57%
18wSentence Length17w
0.33Hedging0.73
0.0Bold8.6
1.3Lists6.5
0.02Emoji0.06
0.00Headings1.18
0.04Transitions0.15
Based on 14 + 15 text responses
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OpenAI o4 Mini HighMistral Medium 3

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
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