Gemini 4 Hydrogen vs Gemini 3.1 Pro Preview Customtools
| Google Gemini 4 Hydrogen | Google Gemini 3.1 Pro Preview Customtools | |
|---|---|---|
| Vendor | ||
| Context window | 1,048,576 | 1,048,576 |
| Max output | 65,536 | 65,536 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image, video, audio, file | text, image, video, audio, file |
| Output | text | text |
| Released | 2026-11-12 | 2026-02-19 |