xAI: Grok 4.5 vs Z.ai: GLM 5.1
xAI: Grok 4.5 and Z.ai: GLM 5.1 are evenly matched; the right pick depends on your priorities.
| Metric | xAI: Grok 4.5 | Z.ai: GLM 5.1 |
|---|---|---|
| Intelligence Index | 53.8✓ | 40.2 |
| Coding Index | 72.4✓ | 55.8 |
| GPQA Diamond | 93%✓ | 87% |
| Design Arena Elo | — | — |
| Speed (tokens/sec) | 74 | 107✓ |
| Latency | 655ms | 302ms✓ |
| Input price /M | $2.00 | $0.966✓ |
| Output price /M | $6.00 | $3.04✓ |
| Context window | 500K✓ | 203K |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSON |