Claude Sonnet 4.5 vs Mistral Large 2

Compare Claude Sonnet 4.5 by Anthropic against Mistral Large 2 by Mistral AI, context windows of 200K vs 128K, tested across 18 shared challenges. Updated April 2026.

Which is better, Claude Sonnet 4.5 or Mistral Large 2?

Claude Sonnet 4.5 and Mistral Large 2 are both competitive models. Claude Sonnet 4.5 costs $3/M input tokens vs $8/M for Mistral Large 2. Context windows: 200K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between Claude Sonnet 4.5 and Mistral Large 2

Claude Sonnet 4.5 is made by anthropic while Mistral Large 2 is from mistral. Claude Sonnet 4.5 has a 200K token context window compared to Mistral Large 2's 128K. On pricing, Claude Sonnet 4.5 costs $3/M input tokens vs $8/M for Mistral Large 2.

Our Verdict
Claude Sonnet 4.5
Claude Sonnet 4.5
Mistral Large 2
Mistral Large 2Runner-up

No community votes yet. On paper, Claude Sonnet 4.5 has the edge — newer, bigger context window, major provider backing.

Too close to call
Writing DNA

Style Comparison

Similarity
100%

Claude Sonnet 4.5 uses 7.5x more transitions

Claude Sonnet 4.5
Mistral Large 2
64%Vocabulary43%
94wSentence Length21w
0.48Hedging0.39
4.9Bold14.4
8.0Lists7.4
0.45Emoji0.80
1.91Headings1.41
0.07Transitions0.01
Based on 20 + 10 text responses
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Claude Sonnet 4.5Mistral 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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