Head to head
Z.ai: GLM 5.3 Flash vs Google: Gemini 3.8 Flash
Live prices, context windows, capabilities, and measured quality — updated continuously.
Side by side
| Metric | Z.ai: GLM 5.3 Flash Z Ai | Google: Gemini 3.8 Flash Google Ai Studio |
|---|---|---|
| Input $/M tokens | $0.075 | $0.750 |
| Output $/M tokens | $0.250 | $3.75 |
| Context window | 1.3M | 1.0M |
| Max output | 131K | 66K |
| WM Score | 93 | 88 |
| Benchmark quality | 89.3 | 86.9 |
| Hosts serving it | 23 | 2 |
| Throughput (tok/s) | 102 | 149 |
| Latency (ms) | 286 | 2460 |
| Vision | ||
| Tools | ||
| Reasoning | ||
| JSON mode |
Which should you pick?
Z.ai: GLM 5.3 Flash costs less per million input tokens — about 10.0× cheaper than Google: Gemini 3.8 Flash. Z.ai: GLM 5.3 Flash 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.