grok-4-fast-reasoning vs Jev
| xAI grok-4-fast-reasoning | TypeSafe Jev | |
|---|---|---|
| Vendor | xAI | TypeSafe |
| Context window | 2,097,152 | 64,000 |
| Max output | 30,000 | — |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| File input | Yes | No |
| Input | text, image | text |
| Output | text | text |
| Released | 2025-08-27 | 2026-09-15 |