grok-4-fast-non-reasoning vs Kimi K2.5
| xAI grok-4-fast-non-reasoning | Moonshot Kimi K2.5 | |
|---|---|---|
| Vendor | xAI | Moonshot |
| Context window | 2,097,152 | 256,144 |
| Max output | 30,000 | 16,384 |
| Reasoning | No | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image | text, video, file, image |
| Output | text | text |
| Released | 2025-08-27 | 2026-01-27 |