Muse Spark 1.2 vs GPT-5.5
| Meta Muse Spark 1.2 | OpenAI GPT-5.5 | |
|---|---|---|
| Vendor | Meta | OpenAI |
| Context window | 1,048,576 | 1,050,000 |
| Max output | — | 128,000 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image, video, file, audio | text, image |
| Output | text | text |
| Released | 2026-08-05 | 2026-04-24 |