Gemini 3.5 Flash vs GPT Image 1.5
| Google Gemini 3.5 Flash | OpenAI GPT Image 1.5 | |
|---|---|---|
| Vendor | OpenAI | |
| Context window | 1,048,576 | 128,000 |
| Max output | 65,536 | — |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| File input | Yes | Yes |
| Input | text, image, video, audio, file | text, image |
| Output | text | image |
| Released | 2026-05-19 | 2025-12-16 |