DeepSeek V4 Flash vs OpenAI: GPT-5.6 Terra
Compare DeepSeek V4 Flash by DeepSeek against OpenAI: GPT-5.6 Terra by OpenAI, context windows of 1.0M vs 1.1M, tested across 54 shared challenges.
Our Verdict
DeepSeek V4 Flash
OpenAI: GPT-5.6 Terra
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 54x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
DeepSeek V4 Flash
Input
$0.14
18× cheaper
Output
$0.28
54× cheaper
OpenAI: GPT-5.6 Terra
Input
$2.50
Output
$15.00
DeepSeek V4 Flash is cheaper on both — 18× input, 54× output
Writing DNA
Style Comparison
Similarity
50%
DeepSeek V4 Flash uses 3.3x more transitions
DeepSeek V4 Flash
OpenAI: GPT-5.6 Terra
54%Vocabulary57%
17wSentence Length18w
0.52Hedging0.85
3.6Bold2.8
2.6Lists4.6
0.00Emoji0.00
0.41Headings1.12
0.19Transitions0.06
Based on 27 + 27 text responses
Research
What we learned reading every model
FAQ
