Grok 4.5 vs Gemini 3.1 Pro Preview Customtools
| xAI Grok 4.5 | Google Gemini 3.1 Pro Preview Customtools | |
|---|---|---|
| Vendor | xAI | |
| Context window | 500,000 | 1,048,576 |
| Max output | 2,000,000 | 65,536 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image | text, image, video, audio, file |
| Output | text | text |
| Released | 2026-07-08 | 2026-02-19 |