Claude 3 Opus vs Mistral Devstral Medium

Compare Claude 3 Opus by Anthropic against Mistral Devstral Medium by Mistral AI, tested across 12 shared challenges. Updated April 2026.

Which is better, Claude 3 Opus or Mistral Devstral Medium?

Claude 3 Opus and Mistral Devstral Medium are both competitive models. Claude 3 Opus 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 3 Opus and Mistral Devstral Medium

Claude 3 Opus is made by anthropic while Mistral Devstral Medium is from mistral. On pricing, Claude 3 Opus costs $15/M input tokens vs $0.4/M for Mistral Devstral Medium.

Our Verdict
Claude 3 Opus
Claude 3 Opus
Mistral Devstral Medium
Mistral Devstral MediumRunner-up

No community votes yet. On paper, Claude 3 Opus 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
98%

Mistral Devstral Medium uses 453.5x more bold

Claude 3 Opus
Mistral Devstral Medium
54%Vocabulary50%
14wSentence Length17w
0.48Hedging0.56
0.0Bold4.5
3.0Lists5.3
0.00Emoji0.00
0.00Headings0.19
0.06Transitions0.32
Based on 3 + 21 text responses
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Claude 3 OpusMistral 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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