GLM-5.1 (Reasoning) vs GPT-5.5 (xhigh)
For product management work, compared on the PM Index.
- GPT-5.5 (xhigh) leads on the PM Index (62.9 vs 53.7).
- GLM-5.1 (Reasoning) is cheaper ($2.15 vs $11.25 per 1M tokens).
- GLM-5.1 (Reasoning) is faster (78 vs 64 tok/s).
| Metric | GLM-5.1 (Reasoning) | GPT-5.5 (xhigh) |
|---|---|---|
| PM Index | 53.7 | 62.9 |
| AA Intelligence | 51.4 | 60.2 |
| AA Coding | 43.4 | 59.1 |
| AA Agentic | 67.1 | 74.1 |
| Blended $/1M | $2.15 | $11.25 |
| Output tok/s | 78 | 64 |