grok-4-fast-reasoning vs Doubao-Seedream-4.5
| xAI grok-4-fast-reasoning | ByteDance Doubao-Seedream-4.5 | |
|---|---|---|
| Vendor | xAI | ByteDance |
| Context window | 2,097,152 | — |
| Max output | 30,000 | — |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| File input | Yes | Yes |
| Input | text, image | text, image |
| Output | text | image |
| Released | 2025-08-27 | 2025-12-03 |