Grok 4.20 vs gpt-4o-image
| xAI Grok 4.20 | OpenAI gpt-4o-image | |
|---|---|---|
| Vendor | xAI | OpenAI |
| Context window | 2,000,000 | — |
| Max output | 2,000,000 | — |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| File input | Yes | No |
| Input | text, image | text |
| Output | text | image, text |
| Released | 2026-03-08 | — |