Anthropic: Claude Fable 5 vs Z.ai: GLM 5.1
Anthropic: Claude Fable 5 wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Anthropic: Claude Fable 5 | Z.ai: GLM 5.1 |
|---|---|---|
| Intelligence Index | 59.9✓ | 40.2 |
| Coding Index | 76.5✓ | 55.8 |
| GPQA Diamond | 93%✓ | 87% |
| Design Arena Elo | 1381✓ | — |
| Speed (tokens/sec) | 54 | 101✓ |
| Latency | 4.2s | 304ms✓ |
| Input price /M | $10.00 | $0.966✓ |
| Output price /M | $50.00 | $3.04✓ |
| Context window | 1M✓ | 203K |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSON |