GPT Image 1.0 vs GLM 5.2
| OpenAI GPT Image 1.0 | Z.ai GLM 5.2 | |
|---|---|---|
| Vendor | OpenAI | Z.ai |
| Context window | 128,000 | 1,000,000 |
| Max output | — | 128,000 |
| Reasoning | No | Yes |
| Tool calling | No | Yes |
| File input | Yes | No |
| Input | text, image | text |
| Output | image | text |
| Released | 2025-04-23 | 2026-06-16 |