In short
How they differ.
Worked out from the figures below. Prices and specs are the makers' own, read Oct 20, 2026.
- Muse Glimmer reads more at once: a context window of 131K tokens against 128K.
- Both can be downloaded and run on your own machine.
- No independent board we follow ranks both models yet.
Side by side
The specs.
| gpt-oss-120b | Muse Glimmer | |
|---|---|---|
| Made by | OpenAI · US | Meta · US |
| Released | Aug 5, 2025 | Aug 2026 |
| Price per 1M tokens | Free to download; hosts set prices | Free to download; hosts set prices |
| Context window | 128K | 131K |
| Takes in | text | text, image |
| Download and run it yourself | Yes (Apache 2.0) | Yes (Apache 2.0) |
| Size | 117B parameters, 5.1B active | ~29.6B (dense; repo header says 30B) parameters |
| Maker says | “production, general purpose, high reasoning use cases” | “Built to enable always-on, local agents, available on Hugging Face.” |
| 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 | gpt-oss-120b | Muse Glimmer |
|---|---|---|
| Vectara hallucination testVectara, Oct 16, 2026 | #9214.2% | Not listed |
More comparisons