Claude Opus 5 vs Mistral Medium 3
Compare Claude Opus 5 by Anthropic against Mistral Medium 3 by Mistral AI, context windows of 1.0M vs 131K, tested across 54 shared challenges.
Our Verdict
Claude Opus 5
Mistral Medium 3Runner-up
No community votes yet. On paper, Claude Opus 5 has the edge — bigger model tier, newer, bigger context window, major provider backing.
Mistral Medium 3 is 13x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
Claude Opus 5
Input
$5.00
Output
$25.00
Mistral Medium 3
Input
$0.40
13× cheaper
Output
$2.00
13× cheaper
Mistral Medium 3 is cheaper on both — 13× input, 13× output
Writing DNA
Style Comparison
Similarity
30%
Mistral Medium 3 uses 3.5x more emoji
Claude Opus 5
Mistral Medium 3
54%Vocabulary57%
21wSentence Length17w
0.40Hedging0.73
3.9Bold8.6
1.9Lists6.5
0.02Emoji0.06
0.71Headings1.18
0.05Transitions0.15
Based on 27 + 15 text responses
Research
What we learned reading every model
FAQ
