Gemini 2.5 Flash Previewvso1
Gemini 2.5 Flash Preview is cheaper than o1 at $0.15/M vs $15/M input tokens.
| Spec | Gemini 2.5 Flash Preview | o1 |
|---|---|---|
| Input price | $0.15/M tokens | $15/M tokens |
| Output price | $0.6/M tokens | $60/M tokens |
| Context window | 1.0M tokens | 128K tokens |
| Released | Apr 2025 | Dec 2024 |
| SWE-bench Verified | 60.4% | 48.9% |
Our Verdict
Gemini 2.5 Flash Preview
o1Runner-up
Not enough votes to call it. On the specs, Gemini 2.5 Flash Preview has the edge: newer, bigger context window.
Gemini 2.5 Flash Preview costs 100x less per token.
Too close to call
API pricing
Cost per 1M tokens
Gemini 2.5 Flash Preview
Input
$0.15
100× cheaper
Output
$0.60
100× cheaper
o1
Input
$15.00
Output
$60.00
Gemini 2.5 Flash Preview is cheaper on both — 100× input, 100× output
Writing DNA
Style Comparison
Similarity
54%
o1 uses 4.9x more headings
Gemini 2.5 Flash Preview
o1
51%Vocabulary64%
15wSentence Length16w
0.70Hedging0.76
4.1Bold5.0
3.3Lists2.6
0.00Emoji0.00
0.09Headings0.44
0.24Transitions0.40
Based on 12 + 13 text responses
Research
What we learned reading every model
FAQ
