gpt-5-pro vs GPT Image 1.5
| OpenAI gpt-5-pro | OpenAI GPT Image 1.5 | |
|---|---|---|
| Vendor | OpenAI | OpenAI |
| Context window | 400,000 | 128,000 |
| Max output | 272,000 | — |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| File input | Yes | Yes |
| Input | text, image | text, image |
| Output | text | image |
| Released | 2025-08-07 | 2025-12-16 |