Claude Opus 5 vs GLM-5.3
Claude Opus 5 (Anthropic) and GLM-5.3 (Zhipu AI (Z.ai)) compared on price, context window, speed and independent benchmarks. Claude Opus 5 scores higher on the Artificial Analysis Intelligence Index (63.1 vs 59.5), while GLM-5.3 is 4.7× cheaper on a blended basis. Pick Claude Opus 5 for the hardest tasks and GLM-5.3 when cost dominates.
| Claude Opus 5 | GLM-5.3 | |
|---|---|---|
| Provider | Anthropic | Zhipu AI (Z.ai) |
| Input $/1M | $5.00 | $1.40 |
| Output $/1M | $25.0 | $4.40 |
| Blended $/1M (3:1) | $10.0 | $2.15 |
| Cached input $/1M | $0.50 | $0.26 |
| Context window | 1M | 1M |
| Knowledge cutoff | 2026-05 | — |
| License | proprietary | open weights |
| Speed (tok/s) | 52 | 78 |
| Artificial Analysis Intelligence Index | 63.1 | 59.5 |
| LMArena Elo | 1505 | 1474 |
| GPQA Diamond | 93.2% | 91.7% |
| SWE-bench Verified | 97% | — |
| LiveCodeBench | 74.6% | — |
| MMLU-Pro | 91.6% | — |
| Humanity's Last Exam | 54.9% | 42.3% |