GLM 5.3 vs Seedance 2.0 Fast
| Z.ai GLM 5.3 | ByteDance Seedance 2.0 Fast | |
|---|---|---|
| Vendor | Z.ai | ByteDance |
| Context window | 1,000,000 | — |
| Max output | 128,000 | — |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| File input | No | Yes |
| Input | text | text, image, video, audio |
| Output | text | video |
| Released | 2026-08-27 | 2026-02-12 |