Doubao-Seedream-4.5 vs Claude Sonnet 5.5
| ByteDance Doubao-Seedream-4.5 | Anthropic Claude Claude Sonnet 5.5 | |
|---|---|---|
| Vendor | ByteDance | Anthropic Claude |
| Context window | — | 1,000,000 |
| Max output | — | 128,000 |
| Reasoning | No | Yes |
| Tool calling | No | Yes |
| File input | Yes | Yes |
| Input | text, image | text, image, file |
| Output | image | text |
| Released | 2025-12-03 | 2026-09-28 |