GPT-5 vs Muse Spark 1.2
| OpenAI GPT-5 | Meta Muse Spark 1.2 | |
|---|---|---|
| Vendor | OpenAI | Meta |
| Context window | 400,000 | 1,048,576 |
| Max output | 128,000 | — |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image | text, image, video, file, audio |
| Output | text | text |
| Released | 2025-08-07 | 2026-08-05 |