Gemini 2.5 Flash Preview 09-2025vsGemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview is cheaper than Gemini 2.5 Flash Preview 09-2025 at $0.25/M vs $0.3/M input tokens.
| Spec | Gemini 2.5 Flash Preview 09-2025 | Gemini 3.1 Flash Lite Preview |
|---|---|---|
| Input price | $0.3/M tokens | $0.25/M tokens |
| Output price | $2.5/M tokens | $1.5/M tokens |
| Context window | 1.0M tokens | 1.0M tokens |
| Released | Sep 2025 | Mar 2026 |
Our Verdict
Gemini 2.5 Flash Preview 09-2025
Gemini 3.1 Flash Lite Preview
Not enough votes to call it. On the specs, nothing separates them.
Too close to call
API pricing
Cost per 1M tokens
Gemini 2.5 Flash Preview 09-2025
Input
$0.30
Output
$2.50
Gemini 3.1 Flash Lite Preview
Input
$0.25
1.2× cheaper
Output
$1.50
1.7× cheaper
Gemini 3.1 Flash Lite Preview is cheaper on both — 1.2× input, 1.7× output
Writing DNA
Style Comparison
Similarity
44%
Gemini 2.5 Flash Preview 09-2025 uses 13.5x more emoji
Gemini 2.5 Flash Preview 09-2025
Gemini 3.1 Flash Lite Preview
53%Vocabulary56%
19wSentence Length18w
0.30Hedging0.28
5.8Bold5.4
3.1Lists3.9
0.14Emoji0.00
0.93Headings0.95
0.22Transitions0.07
Based on 22 + 23 text responses
Research
What we learned reading every model
FAQ
Common questions
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