GPT-2 vs GPT-5 Pro
OpenAI vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5 Pro has a larger context window (400K)
| GPT-2 | GPT-5 Pro | |
|---|---|---|
| Intelligence index | — | 88.4 |
| Developer | OpenAI | OpenAI |
| Type | LLM | LLM |
| Access | Open weights | API only |
| Context window | 1,024 tokens | 400,000 tokens |
| Input price | — | $15.00 / 1M |
| Output price | — | $120.00 / 1M |
| Speed | — | — |
| Released | February 14, 2019 | October 6, 2025 |
| Parameters | 1.5B | — |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |