Gemini 3 Pro Preview vs GPT Image 2.5 Dev
| Google Gemini 3 Pro Preview | OpenAI GPT Image 2.5 Dev | |
|---|---|---|
| Vendor | OpenAI | |
| Context window | 1,000,000 | — |
| Max output | 64,000 | — |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| File input | Yes | Yes |
| Input | text, image, video, audio, file | text, image |
| Output | text | image |
| Released | 2025-11-18 | 2026-09-08 |