Gemini 1.5 Pro vs Gemini 2.5 Pro Preview 06-05
Compare Gemini 1.5 Pro and Gemini 2.5 Pro Preview 06-05, both from Google AI, context windows of 1.0M vs 1.0M, tested across 13 shared challenges.
Our Verdict
Gemini 2.5 Pro Preview 06-05
Gemini 1.5 ProRunner-up
No community votes yet. On paper, Gemini 2.5 Pro Preview 06-05 has the edge — bigger model tier, newer.
Too close to call
API pricing
Cost per 1M tokens
Gemini 1.5 Pro
Input
$3.50
Output
$10.50
Gemini 2.5 Pro Preview 06-05
Input
$1.25
2.8× cheaper
Output
$10.00
1.1× cheaper
Gemini 2.5 Pro Preview 06-05 is cheaper on both — 2.8× input, 1.1× output
Writing DNA
Style Comparison
Similarity
59%
Gemini 2.5 Pro Preview 06-05 uses 12.2x more headings
Gemini 1.5 Pro
Gemini 2.5 Pro Preview 06-05
61%Vocabulary51%
15wSentence Length15w
0.80Hedging0.31
3.7Bold4.8
3.3Lists4.1
0.00Emoji0.00
0.08Headings0.98
0.09Transitions0.05
Based on 8 + 20 text responses
Research
What we learned reading every model
FAQ
