GPT-5.5 vs GPT-5.6 Luna
For product management work, compared on the PM Index.
- GPT-5.5 leads on the PM Index (54.8 vs 52.1).
- GPT-5.6 Luna is cheaper ($2.25 vs $11.25 per 1M tokens).
- GPT-5.6 Luna is faster (204 vs 66 tok/s).
| Metric | GPT-5.5 | GPT-5.6 Luna |
|---|---|---|
| PM Index | 54.8 | 52.1 |
| AA Intelligence | 54.8 | 51.2 |
| AA Coding | 74.9 | 71.4 |
| AA Agentic | 44.9 | 45.6 |
| Blended $/1M | $11.25 | $2.25 |
| Output tok/s | 66 | 204 |