DeepSeek V4 Flash vs GPT-5 Pro
Compare DeepSeek V4 Flash by DeepSeek against GPT-5 Pro by OpenAI, context windows of 1.0M vs 400K, tested across 41 shared challenges.
Our Verdict
DeepSeek V4 Flash
GPT-5 Pro
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 429x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
DeepSeek V4 Flash
Input
$0.14
107× cheaper
Output
$0.28
429× cheaper
GPT-5 Pro
Input
$15.00
Output
$120.00
DeepSeek V4 Flash is cheaper on both — 107× input, 429× output
Writing DNA
Style Comparison
Similarity
51%
DeepSeek V4 Flash uses 363.7x more bold
DeepSeek V4 Flash
GPT-5 Pro
54%Vocabulary65%
17wSentence Length15w
0.52Hedging0.32
3.6Bold0.0
2.6Lists2.9
0.00Emoji0.00
0.41Headings0.00
0.19Transitions0.01
Based on 27 + 11 text responses
Research
What we learned reading every model
FAQ
Common questions
Keep exploring
