DeepSeek: DeepSeek V4 Flash vs Z.ai: GLM 5.1
DeepSeek: DeepSeek V4 Flash wins on more metrics (7 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | DeepSeek: DeepSeek V4 Flash | Z.ai: GLM 5.1 |
|---|---|---|
| Intelligence Index | 40.3✓ | 40.2 |
| Coding Index | 56.2✓ | 55.8 |
| GPQA Diamond | 89%✓ | 87% |
| Design Arena Elo | 1268✓ | — |
| Speed (tokens/sec) | 89 | 119✓ |
| Latency | 570ms | 365ms✓ |
| Input price /M | $0.090✓ | $0.966 |
| Output price /M | $0.180✓ | $3.04 |
| Context window | 1.0M✓ | 203K |
| Capabilities | ReasoningToolsJSON | ReasoningToolsJSON |