Gemini 2.5 Flash Preview vs GPT-5
Compare Gemini 2.5 Flash Preview by Google AI against GPT-5 by OpenAI, in 2 community votes, gemini 2.5 flash preview and gpt-5 are closely matched, context windows of 1.0M vs 400K, tested across 27 shared challenges.
Web Design: Gemini 2.5 Flash Preview and GPT-5 are tied
Our Verdict
GPT-5Winner
Gemini 2.5 Flash PreviewRunner-up
Votes are tied. GPT-5 is newer and likely incorporates more recent improvements.
Gemini 2.5 Flash Preview is 17x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Gemini 2.5 Flash Preview
Input
$0.15
8.3× cheaper
Output
$0.60
17× cheaper
GPT-5
Input
$1.25
Output
$10.00
Gemini 2.5 Flash Preview is cheaper on both — 8.3× input, 17× output
Writing DNA
Style Comparison
Similarity
37%
Gemini 2.5 Flash Preview uses 21.6x more bold
Gemini 2.5 Flash Preview
GPT-5
51%Vocabulary65%
15wSentence Length13w
0.70Hedging0.20
4.1Bold0.2
3.3Lists4.6
0.00Emoji0.00
0.09Headings0.16
0.24Transitions0.03
Based on 12 + 16 text responses
Research
What we learned reading every model
FAQ
