Gemini 2.0 Flash Thinking vs Google: Gemini 2.5 Flash Preview 09-2025
Compare Gemini 2.0 Flash Thinking and Google: Gemini 2.5 Flash Preview 09-2025, both from Google AI, context windows of 500K vs 1.0M, tested across 21 shared challenges.
Our Verdict
Google: Gemini 2.5 Flash Preview 09-2025
Gemini 2.0 Flash ThinkingRunner-up
No community votes yet. On paper, Google: Gemini 2.5 Flash Preview 09-2025 has the edge — bigger model tier, newer, bigger context window.
Gemini 2.0 Flash Thinking is 5.0x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
Gemini 2.0 Flash Thinking
Input
$0.25
1.2× cheaper
Output
$0.50
5.0× cheaper
Google: Gemini 2.5 Flash Preview 09-2025
Input
$0.30
Output
$2.50
Gemini 2.0 Flash Thinking is cheaper on both — 1.2× input, 5.0× output
Writing DNA
Style Comparison
Similarity
42%
Google: Gemini 2.5 Flash Preview 09-2025 uses 13.5x more emoji
Gemini 2.0 Flash Thinking
Google: Gemini 2.5 Flash Preview 09-2025
54%Vocabulary53%
15wSentence Length19w
0.64Hedging0.30
3.8Bold5.8
2.4Lists3.1
0.00Emoji0.14
0.03Headings0.93
0.30Transitions0.22
Based on 13 + 22 text responses
Research
What we learned reading every model
FAQ
