Gemini 2.5 Pro (I/O Edition) vs Gemini 3.5 Flash
Compare Gemini 2.5 Pro (I/O Edition) and Gemini 3.5 Flash, both from Google AI, tested across 40 shared challenges.
Our Verdict
Gemini 2.5 Pro (I/O Edition)
Gemini 3.5 Flash
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 2.5 Pro (I/O Edition)
Input
$1.25
1.2× cheaper
Output
$10.00
Gemini 3.5 Flash
Input
$1.50
Output
$9.00
1.1× cheaper
Gemini 2.5 Pro (I/O Edition) wins input (1.2× cheaper)·Gemini 3.5 Flash wins output (1.1× cheaper)
Writing DNA
Style Comparison
Similarity
50%
Gemini 3.5 Flash uses 9.1x more transitions
Gemini 2.5 Pro (I/O Edition)
Gemini 3.5 Flash
58%Vocabulary59%
16wSentence Length18w
0.38Hedging0.16
5.8Bold4.4
5.0Lists3.0
0.00Emoji0.00
0.63Headings0.89
0.01Transitions0.11
Based on 16 + 27 text responses
Research
What we learned reading every model
FAQ
