Claude Fable 5 vs GPT-5.6 Terra
For product management work, compared on the PM Index.
- Claude Fable 5 leads on the PM Index (60.1 vs 55.7).
- GPT-5.6 Terra is cheaper ($5.63 vs $20.00 per 1M tokens).
- GPT-5.6 Terra is faster (144 vs 63 tok/s).
| Metric | Claude Fable 5 | GPT-5.6 Terra |
|---|---|---|
| PM Index | 60.1 | 55.7 |
| AA Intelligence | 59.9 | 55.0 |
| AA Coding | 76.5 | 76.7 |
| AA Agentic | 52.8 | 47.4 |
| Blended $/1M | $20.00 | $5.63 |
| Output tok/s | 63 | 144 |