Gemini 2.5 Pro (I/O Edition)vsGemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview is cheaper than Gemini 2.5 Pro (I/O Edition) at $0.25/M vs $1.25/M input tokens.
| Spec | Gemini 2.5 Pro (I/O Edition) | Gemini 3.1 Flash Lite Preview |
|---|---|---|
| Input price | $1.25/M tokens | $0.25/M tokens |
| Output price | $10/M tokens | $1.5/M tokens |
| Context window | — | 1.0M tokens |
| Released | May 2025 | Mar 2026 |
Our Verdict
Gemini 2.5 Pro (I/O Edition)
Gemini 3.1 Flash Lite Preview
Not enough votes to call it. On the specs, nothing separates them.
Gemini 3.1 Flash Lite Preview costs 6.7x less per token.
Too close to call
API pricing
Cost per 1M tokens
Gemini 2.5 Pro (I/O Edition)
Input
$1.25
Output
$10.00
Gemini 3.1 Flash Lite Preview
Input
$0.25
5.0× cheaper
Output
$1.50
6.7× cheaper
Gemini 3.1 Flash Lite Preview is cheaper on both — 5.0× input, 6.7× output
Writing DNA
Style Comparison
Similarity
45%
Gemini 3.1 Flash Lite Preview uses 6.1x more transitions
Gemini 2.5 Pro (I/O Edition)
Gemini 3.1 Flash Lite Preview
58%Vocabulary56%
16wSentence Length18w
0.38Hedging0.28
5.8Bold5.4
5.0Lists3.9
0.00Emoji0.00
0.63Headings0.95
0.01Transitions0.07
Based on 16 + 23 text responses
Research
What we learned reading every model
FAQ
Common questions
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