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