Claude Opus 4 vs DeepSeek V4 Flash 0731
Compare Claude Opus 4 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
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
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
37%
Claude Opus 4 uses 11.2x more emoji
Claude Opus 4
DeepSeek V4 Flash 0731
64%Vocabulary52%
62wSentence Length18w
0.52Hedging0.38
4.4Bold5.7
9.1Lists3.4
0.11Emoji0.00
1.87Headings0.83
0.27Transitions0.04
Based on 16 + 23 text responses
Research
What we learned reading every model
FAQ
