Gemini 3.5 Flash vs GPT-5
Compare Gemini 3.5 Flash by Google AI against GPT-5 by OpenAI, context windows of 1.0M vs 400K, tested across 51 shared challenges.
Our Verdict
Gemini 3.5 Flash
GPT-5
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
Gemini 3.5 Flash
Input
$1.50
Output
$9.00
1.1× cheaper
GPT-5
Input
$1.25
1.2× cheaper
Output
$10.00
GPT-5 wins input (1.2× cheaper)·Gemini 3.5 Flash wins output (1.1× cheaper)
Writing DNA
Style Comparison
Similarity
43%
Gemini 3.5 Flash uses 23.4x more bold
Gemini 3.5 Flash
GPT-5
59%Vocabulary65%
18wSentence Length13w
0.16Hedging0.20
4.4Bold0.2
3.0Lists4.6
0.00Emoji0.00
0.89Headings0.16
0.11Transitions0.03
Based on 27 + 16 text responses
Research
What we learned reading every model
FAQ
