GPT-5.1 vs Doubao-Seedream-4.5
| OpenAI GPT-5.1 | ByteDance Doubao-Seedream-4.5 | |
|---|---|---|
| Vendor | OpenAI | ByteDance |
| Context window | 400,000 | — |
| Max output | 128,000 | — |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| File input | Yes | Yes |
| Input | text, image | text, image |
| Output | text | image |
| Released | 2025-11-12 | 2025-09-25 |