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