Seedance 2.0 Fast vs GPT-5.5
| ByteDance Seedance 2.0 Fast | OpenAI GPT-5.5 | |
|---|---|---|
| Vendor | ByteDance | OpenAI |
| Context window | — | 1,050,000 |
| Max output | — | 128,000 |
| Reasoning | No | Yes |
| Tool calling | No | Yes |
| File input | Yes | Yes |
| Input | text, image, video, audio | text, image |
| Output | video | text |
| Released | 2026-02-12 | 2026-04-23 |