Google: Gemini 2.5 Flash Preview 09-2025 vs GPT-4
Compare Google: Gemini 2.5 Flash Preview 09-2025 by Google AI against GPT-4 by OpenAI, context windows of 1.0M vs 8K, tested across 26 shared challenges.
Our Verdict
Google: Gemini 2.5 Flash Preview 09-2025
GPT-4Runner-up
No community votes yet. On paper, Google: Gemini 2.5 Flash Preview 09-2025 has the edge — newer, bigger context window.
Google: Gemini 2.5 Flash Preview 09-2025 is 24x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Google: Gemini 2.5 Flash Preview 09-2025
Input
$0.30
100× cheaper
Output
$2.50
24× cheaper
GPT-4
Input
$30.00
Output
$60.00
Google: Gemini 2.5 Flash Preview 09-2025 is cheaper on both — 100× input, 24× output
Writing DNA
Style Comparison
Similarity
44%
Google: Gemini 2.5 Flash Preview 09-2025 uses 13.5x more emoji
Google: Gemini 2.5 Flash Preview 09-2025
GPT-4
53%Vocabulary59%
19wSentence Length18w
0.30Hedging1.10
5.8Bold0.8
3.1Lists2.5
0.14Emoji0.00
0.93Headings0.00
0.22Transitions0.45
Based on 22 + 15 text responses
Research
What we learned reading every model
FAQ
