Anthropic: Claude Opus 4.8 wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Anthropic: Claude Opus 4.8 | Z.ai: GLM 5 |
|---|---|---|
| Intelligence Index | 61.4✓ | 40.6 |
| Coding Index | 56.7✓ | 39.0 |
| GPQA Diamond | 92%✓ | 67% |
| Design Arena Elo | 1372✓ | 1313 |
| Speed (tokens/sec) | 58 | 95✓ |
| Latency | 1.8s | 384ms✓ |
| Input price /M | $5.00 | $0.600✓ |
| Output price /M | $25.00 | $1.92✓ |
| Context window | 1M✓ | 203K |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSON |