grok-4-fast-non-reasoning vs gpt-4
| xAI grok-4-fast-non-reasoning | OpenAI gpt-4 | |
|---|---|---|
| Vendor | xAI | OpenAI |
| Context window | 2,097,152 | 8,192 |
| Max output | 30,000 | 8,192 |
| Reasoning | No | No |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image | text |
| Output | text | text |
| Released | 2025-08-27 | 2023-11-06 |