gpt-5-pro vs Muse Spark 1.3
| OpenAI gpt-5-pro | Meta Muse Spark 1.3 | |
|---|---|---|
| Vendor | OpenAI | Meta |
| Context window | 400,000 | 1,048,576 |
| Max output | 272,000 | — |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image | text, image, video, file |
| Output | text | text |
| Released | 2025-08-07 | 2026-09-02 |