Gemini 2.5 Flash Preview 09-2025vsMercury 2
Mercury 2 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 | Mercury 2 |
|---|---|---|
| Input price | $0.3/M tokens | $0.25/M tokens |
| Output price | $2.5/M tokens | $0.75/M tokens |
| Context window | 1.0M tokens | 128K tokens |
| Released | Sep 2025 | Mar 2026 |
Our Verdict
Gemini 2.5 Flash Preview 09-2025
Mercury 2Runner-up
Not enough votes to call it. On the specs, Gemini 2.5 Flash Preview 09-2025 has the edge: bigger model tier, bigger context window, major provider backing.
Mercury 2 costs 3.3x less per token.
Too close to call
API pricing
Cost per 1M tokens
Gemini 2.5 Flash Preview 09-2025
Input
$0.30
Output
$2.50
Mercury 2
Input
$0.25
1.2× cheaper
Output
$0.75
3.3× cheaper
Mercury 2 is cheaper on both — 1.2× input, 3.3× output
Writing DNA
Style Comparison
Similarity
66%
Gemini 2.5 Flash Preview 09-2025 uses 1.7x more emoji
Gemini 2.5 Flash Preview 09-2025
Mercury 2
53%Vocabulary53%
19wSentence Length22w
0.30Hedging0.40
5.8Bold6.6
3.1Lists2.6
0.14Emoji0.08
0.93Headings0.87
0.22Transitions0.14
Based on 22 + 23 text responses
Research
What we learned reading every model
FAQ
Common questions
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