GPT-5 Pro vs Mistral Large 2

Compare GPT-5 Pro by OpenAI against Mistral Large 2 by Mistral AI, context windows of 400K vs 128K, tested across 14 shared challenges. Updated April 2026.

Which is better, GPT-5 Pro or Mistral Large 2?

GPT-5 Pro and Mistral Large 2 are both competitive models. GPT-5 Pro costs $15/M input tokens vs $8/M for Mistral Large 2. Context windows: 400K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-5 Pro and Mistral Large 2

GPT-5 Pro is made by openai while Mistral Large 2 is from mistral. GPT-5 Pro has a 400K token context window compared to Mistral Large 2's 128K. On pricing, GPT-5 Pro costs $15/M input tokens vs $8/M for Mistral Large 2.

Our Verdict
GPT-5 Pro
GPT-5 Pro
Mistral Large 2
Mistral Large 2Runner-up

No community votes yet. On paper, GPT-5 Pro has the edge — bigger model tier, newer, bigger context window, major provider backing.

Mistral Large 2 is 5.0x cheaper per token — worth considering if cost matters.

Slight edge
Writing DNA

Style Comparison

Similarity
93%

Mistral Large 2 uses 1437.6x more bold

GPT-5 Pro
Mistral Large 2
65%Vocabulary43%
15wSentence Length21w
0.32Hedging0.39
0.0Bold14.4
2.9Lists7.4
0.00Emoji0.80
0.00Headings1.41
0.01Transitions0.01
Based on 11 + 10 text responses
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GPT-5 ProMistral Large 2

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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