Claude Haiku 4.5 vs Mistral Medium 3

Compare Claude Haiku 4.5 by Anthropic against Mistral Medium 3 by Mistral AI, context windows of 200K vs 131K, tested across 27 shared challenges. Updated April 2026.

Which is better, Claude Haiku 4.5 or Mistral Medium 3?

Claude Haiku 4.5 and Mistral Medium 3 are both competitive models. Claude Haiku 4.5 costs $1/M input tokens vs $0.4/M for Mistral Medium 3. Context windows: 200K vs 131K tokens. Compare their real outputs side by side below.

Key Differences Between Claude Haiku 4.5 and Mistral Medium 3

Claude Haiku 4.5 is made by anthropic while Mistral Medium 3 is from mistral. Claude Haiku 4.5 has a 200K token context window compared to Mistral Medium 3's 131K. On pricing, Claude Haiku 4.5 costs $1/M input tokens vs $0.4/M for Mistral Medium 3.

Our Verdict
Claude Haiku 4.5
Claude Haiku 4.5
Mistral Medium 3
Mistral Medium 3Runner-up

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

Too close to call
Writing DNA

Style Comparison

Similarity
97%

Claude Haiku 4.5 uses 3.4x more emoji

Claude Haiku 4.5
Mistral Medium 3
61%Vocabulary57%
47wSentence Length17w
0.64Hedging0.73
5.1Bold8.6
6.3Lists6.5
0.20Emoji0.06
2.46Headings1.18
0.17Transitions0.15
Based on 24 + 15 text responses
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Claude Haiku 4.5Mistral 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
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