Z.ai: GLM 4.5 Air wins on more metrics (8 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | OpenAI: GPT-4.1 Mini | Z.ai: GLM 4.5 Air |
|---|---|---|
| Intelligence Index | 22.9 | 23.2✓ |
| Coding Index | 18.5 | 23.8✓ |
| GPQA Diamond | 66% | 73%✓ |
| Design Arena Elo | 1140 | 1237✓ |
| Speed (tokens/sec) | 55 | 67✓ |
| Latency | 714ms | 345ms✓ |
| Input price /M | $0.400 | $0.125✓ |
| Output price /M | $1.60 | $0.850✓ |
| Context window | 1.0M✓ | 131K |
| Capabilities | ToolsJSONVision | ReasoningToolsJSON |