GPT-5.6 Terra vs Muse Spark 1.1
For product management work, compared on the PM Index.
- GPT-5.6 Terra leads on the PM Index (55.7 vs 50.1).
- Muse Spark 1.1 is cheaper ($2.00 vs $5.63 per 1M tokens).
- GPT-5.6 Terra is faster (141 vs 118 tok/s).
| Metric | GPT-5.6 Terra | Muse Spark 1.1 |
|---|---|---|
| PM Index | 55.7 | 50.1 |
| AA Intelligence | 55.0 | 50.6 |
| AA Coding | 76.7 | 71.3 |
| AA Agentic | 47.4 | 37.5 |
| Blended $/1M | $5.63 | $2.00 |
| Output tok/s | 141 | 118 |