GPT-5.5 vs GPT-5.6 Terra
For product management work, compared on the PM Index.
- GPT-5.6 Terra leads on the PM Index (55.7 vs 54.8).
- GPT-5.6 Terra is cheaper ($5.63 vs $11.25 per 1M tokens).
- GPT-5.6 Terra is faster (144 vs 66 tok/s).
| Metric | GPT-5.5 | GPT-5.6 Terra |
|---|---|---|
| PM Index | 54.8 | 55.7 |
| AA Intelligence | 54.8 | 55.0 |
| AA Coding | 74.9 | 76.7 |
| AA Agentic | 44.9 | 47.4 |
| Blended $/1M | $11.25 | $5.63 |
| Output tok/s | 66 | 144 |