Anthropic: Claude Sonnet 5 vs Z.ai: GLM 5.2
Z.ai: GLM 5.2 wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Anthropic: Claude Sonnet 5 | Z.ai: GLM 5.2 |
|---|---|---|
| Intelligence Index | 53.4✓ | 51.1 |
| Coding Index | 71.5✓ | 68.8 |
| GPQA Diamond | 91%✓ | 90% |
| Design Arena Elo | 1328✓ | — |
| Speed (tokens/sec) | 69 | 83✓ |
| Latency | 2.9s | 540ms✓ |
| Input price /M | $2.00 | $0.840✓ |
| Output price /M | $10.00 | $2.64✓ |
| Context window | 1M | 1.0M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSON |