GPT-2vsGPT-5
GPT-5 has a larger context window than GPT-2 (400K tokens vs 1K tokens).
| Spec | GPT-2 | GPT-5 |
|---|---|---|
| Input price | — | $1.25/M tokens |
| Output price | — | $10/M tokens |
| Context window | 1K tokens | 400K tokens |
| Parameters | 1.5B | Not disclosed |
| Weights | Open | Closed |
| Free API (OpenRouter) | — | No |
| Released | Nov 2019 | Aug 2025 |
Our Verdict
GPT-5
GPT-2Runner-up
Not enough votes to call it. On the specs, GPT-5 has the edge: bigger model tier, newer, bigger context window.
GPT-5 takes Analysis.
Slight edge
API pricing
Cost per 1M tokens
GPT-2
Input
—
Output
—
GPT-5
Input
$1.25
Output
$10.00
Where to run it
2 hosts
GPT-2
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 9 Sep 2026.
Writing DNA
Style Comparison
Similarity
50%
GPT-5 uses 19.5x more hedging
GPT-2
GPT-5
48%Vocabulary65%
36wSentence Length13w
0.00Hedging0.20
0.0Bold0.2
0.0Lists4.6
0.00Emoji0.00
0.00Headings0.16
0.00Transitions0.03
Based on 7 + 16 text responses
Research
What we learned reading every model
FAQ
