Rival
Sign Up

Claude Opus 4 vs Mistral Devstral Medium

Compare Claude Opus 4 by Anthropic against Mistral Devstral Medium by Mistral AI, in 9 community votes, claude opus 4 wins 89% of head-to-head duels, tested across 35 shared challenges. Updated April 2026.

Which is better, Claude Opus 4 or Mistral Devstral Medium?

Claude Opus 4 is the better choice overall, winning 89% of 9 blind community votes on Rival. Claude Opus 4 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 and Mistral Devstral Medium

Claude Opus 4 is made by anthropic while Mistral Devstral Medium is from mistral. On pricing, Claude Opus 4 costs $15/M input tokens vs $0.4/M for Mistral Devstral Medium. In community voting, In 9 community votes, Claude Opus 4 wins 89% of head-to-head duels.

In 9 community votes, Claude Opus 4 wins 89% of head-to-head duels. Claude Opus 4 leads in Image Generation, Web Design. Based on blind community voting from the Rival open dataset of 9+ human preference judgments for this pair.

Image Generation: Claude Opus 4 wins 100% of votes
Web Design: Claude Opus 4 wins 100% of votes
Our Verdict
Claude Opus 4
Claude Opus 4Winner
Mistral Devstral Medium
Mistral Devstral MediumRunner-up

Pick Claude Opus 4. In 9 blind votes, Claude Opus 4 wins 89% of the time. That's not luck.

Claude Opus 4 particularly excels in Image Generation, Web Design. Mistral Devstral Medium is 38x cheaper per token — worth considering if cost matters.

Clear winner
Writing DNA

Style Comparison

Similarity
92%

Claude Opus 4 uses 11.2x more emoji

Claude Opus 4
Mistral Devstral Medium
64%Vocabulary50%
62wSentence Length17w
0.52Hedging0.56
4.4Bold4.5
9.1Lists5.3
0.11Emoji0.00
1.87Headings0.19
0.27Transitions0.32
Based on 16 + 21 text responses
vs

Ask them anything yourself

Claude Opus 4Mistral Devstral Medium

Some models write identically. You are paying for the brand.

178 models fingerprinted across 32 writing dimensions. Free research.

Model Similarity Index

185x

price gap between models that write identically

178

models

12

clone pairs

32

dimensions

Devstral M / S
95.7%
Qwen3 Coder / Flash
95.6%
GPT-5.4 / Mini
93.3%
Read the full reportor download the 14-slide PDF

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
Free preview13 of 58 slides
Download the free previewor get all 58 slides for $49
FAQ

Common questions

Keep going
Mistral Devstral Medium logoMiniMax M1 logo
Mistral Devstral Medium vs MiniMax M1New provider
Mistral Devstral Medium logoGPT-5 logo
Mistral Devstral Medium vs GPT-5New provider
Mistral Devstral Medium logoGemini 2.5 Pro Preview 06-05 logo
Mistral Devstral Medium vs Gemini 2.5 Pro Preview 06-05New provider