GPT-5.6 Luna vs Muse Spark 1.1
For product management work, compared on the PM Index.
- GPT-5.6 Luna leads on the PM Index (52.1 vs 50.1).
- Muse Spark 1.1 is cheaper ($2.00 vs $2.25 per 1M tokens).
- GPT-5.6 Luna is faster (204 vs 118 tok/s).
| Metric | GPT-5.6 Luna | Muse Spark 1.1 |
|---|---|---|
| PM Index | 52.1 | 50.1 |
| AA Intelligence | 51.2 | 50.6 |
| AA Coding | 71.4 | 71.3 |
| AA Agentic | 45.6 | 37.5 |
| Blended $/1M | $2.25 | $2.00 |
| Output tok/s | 204 | 118 |