GLM 5.3 Flash vs Muse Spark Open
Price, context window & benchmark comparison
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Verdict: GLM 5.3 Flash is 143.4× cheaper than Muse Spark Open on a typical 3:1 input/output mix.
| GLM 5.3 Flash | Muse Spark Open | |
|---|---|---|
| Input price / 1M | $0.013 | $1.25 |
| Output price / 1M | $0.0168 | $4.25 |
| Blended price (3:1) | $0.014 | $2.00 |
| Cached input / 1M | $0.0119 | $0.15 |
| Context window | 1M | 1M |
| Max output | 944K | 131K |
| Intelligence index | 27.8 | — |
| Coding index | 71.5 | — |
| Providers | 40 | — |
| Best provider uptime (30m) | 100.0% | — |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-08-26 | 2026-10-15 |
| Retirement | — | — |
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FAQ
Which is cheaper, GLM 5.3 Flash or Muse Spark Open?
GLM 5.3 Flash is 143.4× cheaper than Muse Spark Open on a typical 3:1 input/output mix.
GLM 5.3 Flash vs Muse Spark Open: which has a bigger context window?
GLM 5.3 Flash: 1,048,576 tokens. Muse Spark Open: 1,048,576 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: GLM 5.3 Flash ≈ $34.40, Muse Spark Open ≈ $4,625.
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