Muse Spark 1.3 vs Claude Fable 5.1
| Meta Muse Spark 1.3 | Anthropic Claude Claude Fable 5.1 | |
|---|---|---|
| Vendor | Meta | Anthropic Claude |
| Context window | 1,048,576 | 1,000,000 |
| Max output | — | 128,000 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image, video, file | text, image, file |
| Output | text | text |
| Released | 2026-09-02 | 2026-09-01 |