GLM 5.3 Flash vs gpt-4
| Z.ai GLM 5.3 Flash | OpenAI gpt-4 | |
|---|---|---|
| Vendor | Z.ai | OpenAI |
| Context window | 1,000,000 | 8,192 |
| Max output | 128,000 | 8,192 |
| Reasoning | Yes | No |
| Tool calling | Yes | Yes |
| File input | No | Yes |
| Input | text | text |
| Output | text | text |
| Released | 2026-08-26 | 2023-11-06 |
| Z.ai GLM 5.3 Flash | OpenAI gpt-4 | |
|---|---|---|
| Vendor | Z.ai | OpenAI |
| Context window | 1,000,000 | 8,192 |
| Max output | 128,000 | 8,192 |
| Reasoning | Yes | No |
| Tool calling | Yes | Yes |
| File input | No | Yes |
| Input | text | text |
| Output | text | text |
| Released | 2026-08-26 | 2023-11-06 |