Claude Opus 4.1 vs Mistral Devstral Medium

Compare Claude Opus 4.1 by Anthropic against Mistral Devstral Medium by Mistral AI, tested across 27 shared challenges. Updated April 2026.

Which is better, Claude Opus 4.1 or Mistral Devstral Medium?

Claude Opus 4.1 and Mistral Devstral Medium are both competitive models. Claude Opus 4.1 costs $15/M input tokens vs $0.4/M for Mistral Devstral Medium. Compare their real outputs side by side below.

Key Differences Between Claude Opus 4.1 and Mistral Devstral Medium

Claude Opus 4.1 is made by anthropic while Mistral Devstral Medium is from mistral. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $0.4/M for Mistral Devstral Medium.

Our Verdict
Claude Opus 4.1
Claude Opus 4.1
Mistral Devstral Medium
Mistral Devstral MediumRunner-up

No community votes yet. On paper, Claude Opus 4.1 has the edge — bigger model tier, bigger context window, major provider backing.

Mistral Devstral Medium is 38x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
92%

Claude Opus 4.1 uses 38.4x more emoji

Claude Opus 4.1
Mistral Devstral Medium
61%Vocabulary50%
87wSentence Length17w
0.54Hedging0.56
5.1Bold4.5
6.7Lists5.3
0.38Emoji0.00
1.68Headings0.19
0.13Transitions0.32
Based on 17 + 21 text responses
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Claude Opus 4.1Mistral Devstral Medium

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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