In short
How they differ.
Worked out from the figures below. Prices and specs are the makers' own, read Oct 20, 2026.
- Muse Spark Open reads more at once: a context window of 1M tokens against 500K.
- Muse Spark Open can be downloaded and run on your own machine; Grok 4.7 can't.
- On the 1 independent board that rank both, Muse Spark Open places higher on 1 and Grok 4.7 on 0.
Side by side
The specs.
| Grok 4.7 | Muse Spark Open | |
|---|---|---|
| Made by | SpaceXSI (formerly xAI) · US | Meta · US |
| Released | Sep 21, 2026 | Oct 15, 2026 |
| Price per 1M tokens | $2 in / $6 out | Free to download; hosts set prices |
| Context window | 500K | 1M |
| Takes in | text, image | text, image, video, audio |
| Download and run it yourself | No | Yes (Muse Model License) |
| Size | Not published | 816B parameters, 42B active |
| Maker says | “Grok 4.7 is our most capable model for coding and knowledge work.” | “The most capable US open-weight model to date. Build your way, anywhere.” |
| Sources | Prices, Oct 20, 2026 · Description | Prices, Oct 20, 2026 · Description |
Independent tests
Where they place.
Position on each board we follow (1 is best). Epoch AI's and Vectara's scores are shown; the other boards are linked for their own figures.
| Board | Grok 4.7 | Muse Spark Open |
|---|---|---|
| LMArena WebDevLMArena, Oct 19, 2026 | #18 | Not listed |
| LMArena Agent ArenaLMArena, Oct 19, 2026 | #17 | Not listed |
| Humanity's Last ExamScale AI | #13 | #11 |
| SWE-Bench ProScale AI, Sep 22, 2026 | Not listed | #11 |
| Vals IndexVals AI, Oct 19, 2026 | #11 | Not listed |
| Terminal-Bench 4.0Vals AI, Oct 19, 2026 | #20 | Not listed |
| Vibe Code BenchVals AI, Oct 18, 2026 | #12 | Not listed |
More comparisons