Z.ai: GLM 5 Turbo wins on more metrics (7 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | OpenAI: GPT-5 Codex | Z.ai: GLM 5 Turbo |
|---|---|---|
| Intelligence Index | 44.6 | 46.8✓ |
| Coding Index | 38.9✓ | 36.8 |
| GPQA Diamond | 84% | 85%✓ |
| Design Arena Elo | 1140 | 1337✓ |
| Speed (tokens/sec) | 13 | 14✓ |
| Latency | 4.6s | 2.6s✓ |
| Input price /M | $1.25 | $1.20✓ |
| Output price /M | $10.00 | $4.00✓ |
| Context window | 400K✓ | 262K |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSON |