DeepSeek V4 Flash vs GPT-5
Compare DeepSeek V4 Flash by DeepSeek against GPT-5 by OpenAI, context windows of 1.0M vs 400K, tested across 51 shared challenges.
Our Verdict
DeepSeek V4 Flash
GPT-5
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 36x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
DeepSeek V4 Flash
Input
$0.14
8.9× cheaper
Output
$0.28
36× cheaper
GPT-5
Input
$1.25
Output
$10.00
DeepSeek V4 Flash is cheaper on both — 8.9× input, 36× output
Writing DNA
Style Comparison
Similarity
46%
DeepSeek V4 Flash uses 19.3x more bold
DeepSeek V4 Flash
GPT-5
54%Vocabulary65%
17wSentence Length13w
0.52Hedging0.20
3.6Bold0.2
2.6Lists4.6
0.00Emoji0.00
0.41Headings0.16
0.19Transitions0.03
Based on 27 + 16 text responses
Research
What we learned reading every model
FAQ
