OpenAI: GPT-5.6 Luna vs Z.ai: GLM 5.2
OpenAI: GPT-5.6 Luna and Z.ai: GLM 5.2 are evenly matched; the right pick depends on your priorities.
| Metric | OpenAI: GPT-5.6 Luna | Z.ai: GLM 5.2 |
|---|---|---|
| Intelligence Index | 51.2✓ | 51.1 |
| Coding Index | 71.4✓ | 68.8 |
| GPQA Diamond | 91%✓ | 90% |
| Design Arena Elo | — | — |
| Speed (tokens/sec) | 60 | 75✓ |
| Latency | 1.7s | 602ms✓ |
| Input price /M | $1.00 | $0.540✓ |
| Output price /M | $6.00 | $1.76✓ |
| Context window | 1.1M✓ | 1.0M |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSON |