Head to head
Z.ai: GLM 5 vs Anthropic: Claude Opus 4.8
Live prices, context windows, capabilities, and measured quality — updated continuously.
Side by side
| Metric | Z.ai: GLM 5 Z Ai | Anthropic: Claude Opus 4.8 Anthropic |
|---|---|---|
| Input $/M tokens | $0.600 | $5.00 |
| Output $/M tokens | $1.92 | $25.00 |
| Context window | 205K | 1.0M |
| Max output | 128K | 128K |
| WM Score | 81 | 82 |
| Benchmark quality | 77.6 | 80.3 |
| Hosts serving it | 8 | 5 |
| Throughput (tok/s) | 64.5 | 68 |
| Latency (ms) | 893 | 1347 |
| Vision | ||
| Tools | ||
| Reasoning | ||
| JSON mode |
Which should you pick?
Z.ai: GLM 5 costs less per million input tokens — about 8.3× cheaper than Anthropic: Claude Opus 4.8. Anthropic: Claude Opus 4.8 scores higher on measured quality. Anthropic: Claude Opus 4.8 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.