GPT Image 2.5 Dev vs GPT Image 1.5
| OpenAI GPT Image 2.5 Dev | OpenAI GPT Image 1.5 | |
|---|---|---|
| Vendor | OpenAI | OpenAI |
| Context window | — | 128,000 |
| Max output | — | — |
| Reasoning | No | No |
| Tool calling | No | No |
| File input | Yes | Yes |
| Input | text, image | text, image |
| Output | image | image |
| Released | 2026-09-08 | 2025-12-16 |