Grok 4.1 Fast vs Mistral Medium 3

Compare Grok 4.1 Fast by xAI against Mistral Medium 3 by Mistral AI, tested across 27 shared challenges. Updated April 2026.

Which is better, Grok 4.1 Fast or Mistral Medium 3?

Grok 4.1 Fast and Mistral Medium 3 are both competitive models. Compare their real outputs side by side below.

Key Differences Between Grok 4.1 Fast and Mistral Medium 3

Grok 4.1 Fast is made by xai while Mistral Medium 3 is from mistral.

Our Verdict
Grok 4.1 Fast
Grok 4.1 Fast
Mistral Medium 3
Mistral Medium 3Runner-up

No community votes yet. On paper, Grok 4.1 Fast has the edge — bigger model tier, newer, major provider backing.

Slight edge
Writing DNA

Style Comparison

Similarity
100%

Mistral Medium 3 uses 6.0x more emoji

Grok 4.1 Fast
Mistral Medium 3
67%Vocabulary57%
15wSentence Length17w
0.17Hedging0.73
4.7Bold8.6
3.7Lists6.5
0.00Emoji0.06
0.99Headings1.18
0.14Transitions0.15
Based on 24 + 15 text responses
vs

Ask them anything yourself

Grok 4.1 FastMistral 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

Common questions