DeepSeek V4 Pro vs GPT-5.4 Nano
Compare DeepSeek V4 Pro by DeepSeek against GPT-5.4 Nano by OpenAI, context windows of 1.0M vs 400K, tested across 53 shared challenges.
Our Verdict
DeepSeek V4 Pro
GPT-5.4 NanoRunner-up
No community votes yet. On paper, DeepSeek V4 Pro has the edge — bigger model tier, newer, bigger context window.
Slight edge
API pricing
Cost per 1M tokens
DeepSeek V4 Pro
Input
$1.74
Output
$3.48
GPT-5.4 Nano
Input
$0.20
8.7× cheaper
Output
$1.25
2.8× cheaper
GPT-5.4 Nano is cheaper on both — 8.7× input, 2.8× output
Writing DNA
Style Comparison
Similarity
36%
DeepSeek V4 Pro uses 3.5x more emoji
DeepSeek V4 Pro
GPT-5.4 Nano
57%Vocabulary51%
18wSentence Length21w
0.52Hedging0.58
3.3Bold7.1
2.3Lists5.5
0.04Emoji0.01
0.45Headings1.39
0.15Transitions0.05
Based on 27 + 23 text responses
Research
What we learned reading every model
FAQ
