Head to head
Z.ai: GLM 5.3 Flash vs SpaceXAI: Grok 4.6
Live prices, context windows, capabilities, and measured quality — updated continuously.
Side by side
| Metric | Z.ai: GLM 5.3 Flash Z Ai | SpaceXAI: Grok 4.6 Xai |
|---|---|---|
| Input $/M tokens | $0.075 | $2.00 |
| Output $/M tokens | $0.250 | $6.00 |
| Context window | 1.3M | 500K |
| Max output | 131K | 450K |
| WM Score | 95 | 91 |
| Benchmark quality | 93.1 | 94.4 |
| Hosts serving it | 12 | 2 |
| Throughput (tok/s) | 130 | 52 |
| Latency (ms) | 727 | 1753 |
| Vision | ||
| Tools | ||
| Reasoning | ||
| JSON mode |
Which should you pick?
Z.ai: GLM 5.3 Flash costs less per million input tokens — about 26.7× cheaper than SpaceXAI: Grok 4.6. SpaceXAI: Grok 4.6 scores higher on measured quality. Z.ai: GLM 5.3 Flash takes a larger context window, which matters for long documents or big codebases. Prices here are live list prices; the same model can cost less on a different host, so check the model page for the cheapest offering.