Claude Opus 4.1 vs DeepSeek V4 Flash
Compare Claude Opus 4.1 by Anthropic against DeepSeek V4 Flash by DeepSeek, context windows of 200K vs 1.0M, tested across 53 shared challenges.
Our Verdict
Claude Opus 4.1
DeepSeek V4 Flash
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 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
Input
$0.14
107× cheaper
Output
$0.28
268× cheaper
DeepSeek V4 Flash is cheaper on both — 107× input, 268× output
Writing DNA
Style Comparison
Similarity
27%
Claude Opus 4.1 uses 38.4x more emoji
Claude Opus 4.1
DeepSeek V4 Flash
61%Vocabulary54%
87wSentence Length17w
0.54Hedging0.52
5.1Bold3.6
6.7Lists2.6
0.38Emoji0.00
1.68Headings0.41
0.13Transitions0.19
Based on 17 + 27 text responses
Research
What we learned reading every model
FAQ
