Grok 4.5 vs gpt-4-turbo-preview
| xAI Grok 4.5 | OpenAI gpt-4-turbo-preview | |
|---|---|---|
| Vendor | xAI | OpenAI |
| Context window | 500,000 | 128,000 |
| Max output | 2,000,000 | 4,096 |
| Reasoning | Yes | No |
| Tool calling | Yes | Yes |
| File input | Yes | No |
| Input | text, image | text |
| Output | text | text |
| Released | 2026-07-07 | — |