GPT Image 2.5 Dev vs Gemini 3.1 Pro Preview
| OpenAI GPT Image 2.5 Dev | Google Gemini 3.1 Pro Preview | |
|---|---|---|
| Vendor | OpenAI | |
| Context window | — | 1,048,576 |
| Max output | — | 65,536 |
| Reasoning | No | Yes |
| Tool calling | No | Yes |
| File input | Yes | Yes |
| Input | text, image | text, image, video, audio, file |
| Output | image | text |
| Released | 2026-09-08 | 2026-02-19 |