GPT-5.6 Sol vs GLM-5.3
GPT-5.6 Sol (OpenAI) and GLM-5.3 (Zhipu AI (Z.ai)) compared on price, context window, speed and independent benchmarks. GPT-5.6 Sol scores higher on the Artificial Analysis Intelligence Index (60.9 vs 59.5), while GLM-5.3 is 3.7× cheaper on a blended basis. Pick GPT-5.6 Sol for the hardest tasks and GLM-5.3 when cost dominates.
| GPT-5.6 Sol | GLM-5.3 | |
|---|---|---|
| Provider | OpenAI | Zhipu AI (Z.ai) |
| Input $/1M | $4.00 | $1.40 |
| Output $/1M | $20.0 | $4.40 |
| Blended $/1M (3:1) | $8.00 | $2.15 |
| Cached input $/1M | $0.40 | $0.26 |
| Context window | 1.1M | 1M |
| Knowledge cutoff | 2026-02 | — |
| License | proprietary | open weights |
| Speed (tok/s) | 81 | 78 |
| Artificial Analysis Intelligence Index | 60.9 | 59.5 |
| LMArena Elo | 1455 | 1474 |
| GPQA Diamond | 94.1% | 91.7% |
| Humanity's Last Exam | 49.5% | 42.3% |