Gemini 2.5 Flash Preview 05-20 (thinking) vs Gemini Pro 1.0
Compare Gemini 2.5 Flash Preview 05-20 (thinking) and Gemini Pro 1.0, both from Google AI, context windows of 1.0M vs 33K, tested across 9 shared challenges.
Our Verdict
Gemini 2.5 Flash Preview 05-20 (thinking)
Gemini Pro 1.0
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 Flash Preview 05-20 (thinking)
Input
$0.15
3.3× cheaper
Output
$3.50
Gemini Pro 1.0
Input
$0.50
Output
$1.50
2.3× cheaper
Gemini 2.5 Flash Preview 05-20 (thinking) wins input (3.3× cheaper)·Gemini Pro 1.0 wins output (2.3× cheaper)
Writing DNA
Style Comparison
Similarity
66%
Gemini Pro 1.0 uses 40.5x more hedging
Gemini 2.5 Flash Preview 05-20 (thinking)
Gemini Pro 1.0
70%Vocabulary61%
11wSentence Length13w
0.00Hedging0.41
4.2Bold5.3
7.3Lists5.4
0.00Emoji0.00
0.00Headings0.46
0.00Transitions0.38
Based on 3 + 13 text responses
Research
What we learned reading every model
FAQ
