GPT-5 Codex vs o1-pro
OpenAI vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5 Codex has the higher intelligence index (87.1 vs 82.5)
- •GPT-5 Codex is cheaper ($1.25 vs $150.00 per 1M input)
- •GPT-5 Codex has a larger context window (400K)
| GPT-5 Codex | o1-pro | |
|---|---|---|
| Intelligence index | 87.1 | 82.5 |
| Developer | OpenAI | OpenAI |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 400,000 tokens | 200,000 tokens |
| Input price | $1.25 / 1M | $150.00 / 1M |
| Output price | $10.00 / 1M | $600.00 / 1M |
| Speed | 180 tok/s | — |
| Released | September 23, 2025 | March 19, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
GPT-5 Codex
o1-pro
GPQA Diamond
83.7
79