GPT-5.2 Provso3 Mini
o3 Mini is cheaper than GPT-5.2 Pro at $1.1/M vs $21/M input tokens.
| Spec | GPT-5.2 Pro | o3 Mini |
|---|---|---|
| Input price | $21/M tokens | $1.1/M tokens |
| Output price | $168/M tokens | $4.4/M tokens |
| Context window | 400K tokens | 64K tokens |
| Weights | Closed | Closed |
| Free API (OpenRouter) | No | No |
| Released | Dec 2025 | Dec 2024 |
Our Verdict
GPT-5.2 Pro
o3 MiniRunner-up
Not enough votes to call it. On the specs, GPT-5.2 Pro has the edge: bigger model tier, newer, bigger context window.
o3 Mini costs 38x less per token.
Slight edge
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
GPT-5.2 Pro
Input
$21.00
Output
$168.00
o3 Mini
Input
$1.10
19× cheaper
Output
$4.40
38× cheaper
o3 Mini is cheaper on both: 19× input, 38× output.
Where to run it
2 hosts
GPT-5.2 Pro1 host
o3 Mini1 host
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
34%
o3 Mini uses 18.2x more transitions
GPT-5.2 Pro
o3 Mini
62%Vocabulary65%
19wSentence Length18w
0.39Hedging0.84
8.6Bold2.8
3.8Lists1.5
0.00Emoji0.00
1.17Headings0.33
0.02Transitions0.29
Based on 10 + 17 text responses
Research
What we learned reading every model
FAQ
Common questions
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