Grok 3 vs Mistral Medium 3

Compare Grok 3 by xAI against Mistral Medium 3 by Mistral AI, context windows of 128K vs 131K, tested across 26 shared challenges. Updated April 2026.

Which is better, Grok 3 or Mistral Medium 3?

Grok 3 and Mistral Medium 3 are both competitive models. Context windows: 128K vs 131K tokens. Compare their real outputs side by side below.

Key Differences Between Grok 3 and Mistral Medium 3

Grok 3 is made by xai while Mistral Medium 3 is from mistral. Grok 3 has a 128K token context window compared to Mistral Medium 3's 131K.

Our Verdict
Grok 3
Grok 3
Mistral Medium 3
Mistral Medium 3Runner-up

No community votes yet. On paper, Grok 3 has the edge — bigger model tier, major provider backing.

Too close to call
Writing DNA

Style Comparison

Similarity
91%

Mistral Medium 3 uses 3.5x more bold

Grok 3
Mistral Medium 3
49%Vocabulary57%
18wSentence Length17w
0.94Hedging0.73
2.5Bold8.6
3.0Lists6.5
0.04Emoji0.06
0.65Headings1.18
0.08Transitions0.15
Based on 17 + 15 text responses
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Ask them anything yourself

Grok 3Mistral 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
FAQ

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