gpt-4.1 vs Grok 4.5
| OpenAI gpt-4.1 | xAI Grok 4.5 | |
|---|---|---|
| Vendor | OpenAI | xAI |
| Context window | 1,047,576 | 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 | 2025-04-14 | 2026-07-08 |