Doubao-Seedream-4.5 vs Claude Fable 5.1
| ByteDance Doubao-Seedream-4.5 | Anthropic Claude Claude Fable 5.1 | |
|---|---|---|
| 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 |
| Output | image | text |
| Released | 2025-09-25 | 2026-08-31 |