Google: Gemini 2.5 Flash Preview 09-2025 vs GPT-5
Compare Google: Gemini 2.5 Flash Preview 09-2025 by Google AI against GPT-5 by OpenAI, in 3 community votes, gpt-5 wins 100% of head-to-head duels, context windows of 1.0M vs 400K, tested across 50 shared challenges.
Our Verdict
GPT-5Winner
Google: Gemini 2.5 Flash Preview 09-2025Runner-up
Pick GPT-5. In 3 blind votes, GPT-5 wins 100% of the time. That's not luck.
Google: Gemini 2.5 Flash Preview 09-2025 is 4.0x cheaper per token — worth considering if cost matters.
Clear winner
API pricing
Cost per 1M tokens
Google: Gemini 2.5 Flash Preview 09-2025
Input
$0.30
4.2× cheaper
Output
$2.50
4.0× cheaper
GPT-5
Input
$1.25
Output
$10.00
Google: Gemini 2.5 Flash Preview 09-2025 is cheaper on both — 4.2× input, 4.0× output
Writing DNA
Style Comparison
Similarity
50%
Google: Gemini 2.5 Flash Preview 09-2025 uses 13.5x more emoji
Google: Gemini 2.5 Flash Preview 09-2025
GPT-5
53%Vocabulary65%
19wSentence Length13w
0.30Hedging0.20
5.8Bold0.2
3.1Lists4.6
0.14Emoji0.00
0.93Headings0.16
0.22Transitions0.03
Based on 22 + 16 text responses
Research
What we learned reading every model
FAQ
