GLM-5.3 vs Gemini 3.8 Flash
GLM-5.3 (Zhipu AI (Z.ai)) and Gemini 3.8 Flash (Google) compared on price, context window, speed and independent benchmarks. GLM-5.3 scores higher on the Artificial Analysis Intelligence Index (59.5 vs 58.7), while Gemini 3.8 Flash is 1.4× cheaper on a blended basis. Pick GLM-5.3 for the hardest tasks and Gemini 3.8 Flash when cost dominates.
| GLM-5.3 | Gemini 3.8 Flash | |
|---|---|---|
| Provider | Zhipu AI (Z.ai) | |
| Input $/1M | $1.40 | $0.75 |
| Output $/1M | $4.40 | $3.75 |
| Blended $/1M (3:1) | $2.15 | $1.50 |
| Cached input $/1M | $0.26 | $0.07 |
| Context window | 1M | 1.0M |
| Knowledge cutoff | — | — |
| License | open weights | proprietary |
| Speed (tok/s) | 78 | 417 |
| Artificial Analysis Intelligence Index | 59.5 | 58.7 |
| LMArena Elo | 1474 | — |
| GPQA Diamond | 91.7% | 95.3% |
| Humanity's Last Exam | 42.3% | 47.8% |