OpenAI o4 Mini High vs Mistral Nemo

Compare OpenAI o4 Mini High by OpenAI against Mistral Nemo by Mistral AI, context windows of 200K vs 128K, tested across 18 shared challenges. Updated April 2026.

Which is better, OpenAI o4 Mini High or Mistral Nemo?

OpenAI o4 Mini High and Mistral Nemo are both competitive models. OpenAI o4 Mini High costs $1.1/M input tokens vs $0.03/M for Mistral Nemo. Context windows: 200K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between OpenAI o4 Mini High and Mistral Nemo

OpenAI o4 Mini High is made by openai while Mistral Nemo is from mistral. OpenAI o4 Mini High has a 200K token context window compared to Mistral Nemo's 128K. On pricing, OpenAI o4 Mini High costs $1.1/M input tokens vs $0.03/M for Mistral Nemo.

Our Verdict
OpenAI o4 Mini High
OpenAI o4 Mini High
Mistral Nemo
Mistral Nemo

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

Mistral Nemo is 63x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
85%

Mistral Nemo uses 357.9x more bold

OpenAI o4 Mini High
Mistral Nemo
70%Vocabulary46%
18wSentence Length19w
0.33Hedging1.08
0.0Bold3.6
1.3Lists8.0
0.02Emoji0.00
0.00Headings0.00
0.04Transitions0.17
Based on 14 + 10 text responses
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OpenAI o4 Mini HighMistral Nemo

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
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