GLM 5.1 vs gpt-4o-all
| Z.ai GLM 5.1 | OpenAI gpt-4o-all | |
|---|---|---|
| Vendor | Z.ai | OpenAI |
| Context window | 200,000 | — |
| Max output | 128,000 | — |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| File input | No | No |
| Input | text | — |
| Output | text | — |
| Released | 2026-04-07 | — |
| Z.ai GLM 5.1 | OpenAI gpt-4o-all | |
|---|---|---|
| Vendor | Z.ai | OpenAI |
| Context window | 200,000 | — |
| Max output | 128,000 | — |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| File input | No | No |
| Input | text | — |
| Output | text | — |
| Released | 2026-04-07 | — |