GPT-5.2 Provso1
o1 is cheaper than GPT-5.2 Pro at $15/M vs $21/M input tokens.
| Spec | GPT-5.2 Pro | o1 |
|---|---|---|
| Input price | $21/M tokens | $15/M tokens |
| Output price | $168/M tokens | $60/M tokens |
| Context window | 400K tokens | 128K tokens |
| Released | Dec 2025 | Dec 2024 |
| SWE-bench Verified | 80.0% | 48.9% |
Our Verdict
GPT-5.2 Pro
o1Runner-up
Not enough votes to call it. On the specs, GPT-5.2 Pro has the edge: bigger model tier, newer, bigger context window.
Slight edge
API pricing
Cost per 1M tokens
GPT-5.2 Pro
Input
$21.00
Output
$168.00
o1
Input
$15.00
1.4× cheaper
Output
$60.00
2.8× cheaper
o1 is cheaper on both — 1.4× input, 2.8× output
Writing DNA
Style Comparison
Similarity
43%
o1 uses 18.3x more transitions
GPT-5.2 Pro
o1
62%Vocabulary65%
19wSentence Length16w
0.39Hedging0.81
8.6Bold3.6
3.8Lists2.1
0.00Emoji0.00
1.17Headings0.32
0.02Transitions0.29
Based on 10 + 18 text responses
Research
What we learned reading every model
FAQ
