Claude Opus 4.1 vs DeepSeek V4 Flash 0731
Compare Claude Opus 4.1 by Anthropic against DeepSeek V4 Flash 0731 by DeepSeek, context windows of 200K vs 1.0M, tested across 42 shared challenges.
Our Verdict
Claude Opus 4.1
DeepSeek V4 Flash 0731
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
DeepSeek V4 Flash 0731 is 268x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Opus 4.1
Input
$15.00
Output
$75.00
DeepSeek V4 Flash 0731
Input
$0.14
107× cheaper
Output
$0.28
268× cheaper
DeepSeek V4 Flash 0731 is cheaper on both — 107× input, 268× output
Writing DNA
Style Comparison
Similarity
33%
Claude Opus 4.1 uses 38.4x more emoji
Claude Opus 4.1
DeepSeek V4 Flash 0731
61%Vocabulary52%
87wSentence Length18w
0.54Hedging0.38
5.1Bold5.7
6.7Lists3.4
0.38Emoji0.00
1.68Headings0.83
0.13Transitions0.04
Based on 17 + 23 text responses
Research
What we learned reading every model
FAQ
