Gemini 2.5 Flash Preview vs Gemini 2.5 Pro Preview 06-05
Compare Gemini 2.5 Flash Preview and Gemini 2.5 Pro Preview 06-05, both from Google AI, context windows of 1.0M vs 1.0M, tested across 21 shared challenges.
Our Verdict
Gemini 2.5 Pro Preview 06-05
Gemini 2.5 Flash PreviewRunner-up
No community votes yet. On paper, Gemini 2.5 Pro Preview 06-05 has the edge — bigger model tier, newer.
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
Gemini 2.5 Pro Preview 06-05
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
58%
Gemini 2.5 Pro Preview 06-05 uses 11.1x more headings
Gemini 2.5 Flash Preview
Gemini 2.5 Pro Preview 06-05
51%Vocabulary51%
15wSentence Length15w
0.70Hedging0.31
4.1Bold4.8
3.3Lists4.1
0.00Emoji0.00
0.09Headings0.98
0.24Transitions0.05
Based on 12 + 20 text responses
Research
What we learned reading every model
FAQ
