GLM-5.3 uses the same base model as GLM-5.2 — every gain comes from post-training. Compared with GLM-5.2, it is much better at complex coding and long-horizon tasks:
function_calling| Model | Context | Max out |
|---|---|---|
| GLM-5.3-BF16 | 1.0M | — |
| GLM-5.3-Flash | 1M | 128K |
| GLM-5.3 | 1.0M | 128K |
/v1/models/huggingface/zai-org/GLM-5.3-BF16GLM-5.3 uses the same base model as GLM-5.2 — every gain comes from post-training. Compared with GLM-5.2, it is much better at complex coding and long-horizon tasks: