GPT Image 1.5 vs grok-3
| OpenAI GPT Image 1.5 | xAI grok-3 | |
|---|---|---|
| Vendor | OpenAI | xAI |
| Context window | 128,000 | 131,072 |
| Max output | — | 8,192 |
| Reasoning | No | No |
| Tool calling | No | Yes |
| File input | Yes | Yes |
| Input | text, image | text |
| Output | image | text |
| Released | 2025-12-16 | 2025-02-17 |