Z.ai: GLM 4.5 wins on more metrics (6 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | OpenAI: GPT-4.1 | Z.ai: GLM 4.5 |
|---|---|---|
| Intelligence Index | 26.3 | 26.4✓ |
| Coding Index | 21.8 | 26.3✓ |
| GPQA Diamond | 67% | 78%✓ |
| Design Arena Elo | 1149 | 1251✓ |
| Speed (tokens/sec) | 48✓ | 40 |
| Latency | 713ms✓ | 2.4s |
| Input price /M | $2.00 | $0.600✓ |
| Output price /M | $8.00 | $2.20✓ |
| Context window | 1.0M✓ | 131K |
| Capabilities | ToolsJSONVision | ReasoningToolsJSON |