Z.ai: GLM 5.3 vs GPT Image 2
| Z Ai Z.ai: GLM 5.3 | OpenAI GPT Image 2 | |
|---|---|---|
| Vendor | Z Ai | OpenAI |
| Context window | 1,048,576 | 128,000 |
| Max output | 131,072 | — |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| File input | No | Yes |
| Input | text | text, image |
| Output | text | image |
| Released | — | 2026-04-21 |