Muse Spark Open vs GLM 5.1
GLM 5.1 is cheaper on output tokens, while Muse Spark Open offers a larger context window. Choose Muse Spark Open or GLM 5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Muse Spark Open | GLM 5.1 |
|---|---|---|
| Provider | Meta | Z.ai |
| Input / 1M tokens | $1.25 | $0.97 |
| Output / 1M tokens | $4.25 | $3.04 |
| Context window | 1M | 205K |
| Parameters | — | 754B |
| Open weights | — | — |
| Released | — | Apr 2026 |
| LMArena WebDev Elo score | 1511 | 1508 |
| LiveBench score | — | 70.6 |
| GPQA Diamond score | — | 89.9 |
| FrontierMath score | — | 33.5 |
| Epoch Capabilities Index score | — | 150 |
| LMArena (Chatbot Arena) Elo score | — | 1462 |
FAQ
Is Muse Spark Open or GLM 5.1 cheaper?
GLM 5.1 is cheaper on output tokens ($3.04 vs $4.25 per 1M).
Which has the larger context window, Muse Spark Open or GLM 5.1?
Muse Spark Open has the larger context window (1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.