GLM 5.1 vs Gemini 3.1 Pro Preview
| Z.ai GLM 5.1 | Google Gemini 3.1 Pro Preview | |
|---|---|---|
| Vendor | Z.ai | |
| Context window | 200,000 | 1,048,576 |
| Max output | 128,000 | 65,536 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | No | Yes |
| Input | text | text, image, video, audio, file |
| Output | text | text |
| Released | 2026-04-07 | 2026-02-19 |