GPT Image 1.5 vs grok-4-1-fast-non-reasoning
| OpenAI GPT Image 1.5 | xAI grok-4-1-fast-non-reasoning | |
|---|---|---|
| Vendor | OpenAI | xAI |
| Context window | 128,000 | 2,097,152 |
| Max output | — | 32,768 |
| Reasoning | No | No |
| Tool calling | No | Yes |
| File input | Yes | Yes |
| Input | text, image | text, image |
| Output | image | text |
| Released | 2025-12-16 | 2025-11-19 |