GPT-5.6 Sol vs Muse Spark 1.2
Price, context window & benchmark comparison
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Verdict: Muse Spark 1.2 is 2.0× cheaper than GPT-5.6 Sol on a typical 3:1 input/output mix. GPT-5.6 Sol scores higher on the Artificial Analysis Intelligence Index (47 vs 39.6). GPT-5.6 Sol has the larger context window (1.1M vs 1M).
| GPT-5.6 Sol | Muse Spark 1.2 | |
|---|---|---|
| Input price / 1M | $2.00 | $1.25 |
| Output price / 1M | $10.00 | $4.25 |
| Blended price (3:1) | $4.00 | $2.00 |
| Cached input / 1M | $0.20 | $0.15 |
| Context window | 1.1M | 1M |
| Max output | 128K | 944K |
| Intelligence index | 47 | 39.6 |
| Coding index | 77.4 | 72.2 |
| Providers | — | — |
| Best provider uptime (30m) | — | — |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-07-09 | 2026-08-05 |
| Retirement | — | — |
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FAQ
Which is cheaper, GPT-5.6 Sol or Muse Spark 1.2?
Muse Spark 1.2 is 2.0× cheaper than GPT-5.6 Sol on a typical 3:1 input/output mix.
GPT-5.6 Sol vs Muse Spark 1.2: which has a bigger context window?
GPT-5.6 Sol: 1,050,000 tokens. Muse Spark 1.2: 1,048,576 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: GPT-5.6 Sol ≈ $9,000, Muse Spark 1.2 ≈ $4,625.
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