Z.ai: GLM 4.6 wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | xAI: Grok 4.20 | Z.ai: GLM 4.6 |
|---|---|---|
| Intelligence Index | 29.7 | 30.2✓ |
| Coding Index | 25.4 | 30.2✓ |
| GPQA Diamond | 79%✓ | 63% |
| Design Arena Elo | — | 1219✓ |
| Speed (tokens/sec) | 76✓ | 42 |
| Latency | 707ms✓ | 840ms |
| Input price /M | $1.25 | $0.430✓ |
| Output price /M | $2.50 | $1.74✓ |
| Context window | 2M✓ | 203K |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSON |