xAI: Grok 4 vs Mistral Medium 3

Compare xAI: Grok 4 by xAI against Mistral Medium 3 by Mistral AI, context windows of 256K vs 131K, tested across 23 shared challenges. Updated April 2026.

Which is better, xAI: Grok 4 or Mistral Medium 3?

xAI: Grok 4 and Mistral Medium 3 are both competitive models. xAI: Grok 4 costs $3/M input tokens vs $0.4/M for Mistral Medium 3. Context windows: 256K vs 131K tokens. Compare their real outputs side by side below.

Key Differences Between xAI: Grok 4 and Mistral Medium 3

xAI: Grok 4 is made by xai while Mistral Medium 3 is from mistral. xAI: Grok 4 has a 256K token context window compared to Mistral Medium 3's 131K. On pricing, xAI: Grok 4 costs $3/M input tokens vs $0.4/M for Mistral Medium 3.

Our Verdict
xAI: Grok 4
xAI: Grok 4
Mistral Medium 3
Mistral Medium 3Runner-up

No community votes yet. On paper, xAI: Grok 4 has the edge — newer, bigger context window, major provider backing.

Mistral Medium 3 is 7.5x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
100%

Mistral Medium 3 uses 3.5x more transitions

xAI: Grok 4
Mistral Medium 3
53%Vocabulary57%
18wSentence Length17w
0.67Hedging0.73
2.7Bold8.6
2.7Lists6.5
0.07Emoji0.06
0.86Headings1.18
0.04Transitions0.15
Based on 21 + 15 text responses
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xAI: Grok 4Mistral Medium 3

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