DeepSeek V4 Pro vs Google: Gemini 2.5 Flash Preview 09-2025
Compare DeepSeek V4 Pro by DeepSeek against Google: Gemini 2.5 Flash Preview 09-2025 by Google AI, context windows of 1.0M vs 1.0M, tested across 50 shared challenges.
Our Verdict
DeepSeek V4 Pro
Google: Gemini 2.5 Flash Preview 09-2025
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
API pricing
Cost per 1M tokens
DeepSeek V4 Pro
Input
$1.74
Output
$3.48
Google: Gemini 2.5 Flash Preview 09-2025
Input
$0.30
5.8× cheaper
Output
$2.50
1.4× cheaper
Google: Gemini 2.5 Flash Preview 09-2025 is cheaper on both — 5.8× input, 1.4× output
Writing DNA
Style Comparison
Similarity
45%
Google: Gemini 2.5 Flash Preview 09-2025 uses 3.9x more emoji
DeepSeek V4 Pro
Google: Gemini 2.5 Flash Preview 09-2025
57%Vocabulary53%
18wSentence Length19w
0.52Hedging0.30
3.3Bold5.8
2.3Lists3.1
0.04Emoji0.14
0.45Headings0.93
0.15Transitions0.22
Based on 27 + 22 text responses
Research
What we learned reading every model
FAQ
