grok-4-1-fast-non-reasoning vs Grok 4.5
| xAI grok-4-1-fast-non-reasoning | xAI Grok 4.5 | |
|---|---|---|
| Vendor | xAI | xAI |
| Context window | 2,097,152 | 500,000 |
| Max output | 32,768 | 2,000,000 |
| Reasoning | No | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image | text, image |
| Output | text | text |
| Released | 2025-11-19 | 2026-07-08 |