GLM 5 vs GLM 5.1
GLM 5.1 is cheaper on output tokens. Choose GLM 5 or GLM 5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GLM 5 | GLM 5.1 |
|---|---|---|
| Provider | Z.ai | Z.ai |
| Input / 1M tokens | $1.00 | $0.97 |
| Output / 1M tokens | $3.20 | $3.04 |
| Context window | 205K | 205K |
| Parameters | 744B | 754B |
| Open weights | Yes | — |
| Released | Feb 2026 | Apr 2026 |
| LiveBench score | 68.7 | 70.6 |
| SWE-bench Verified score | 72.8 | — |
| SWE-bench Multilingual score | 69.7 | — |
| LMArena (Chatbot Arena) Elo score | 1446 | 1463 |
| LMArena WebDev Elo score | 1435 | 1508 |
| GPQA Diamond score | 87.8 | 89.9 |
| FrontierMath score | 16.4 | 33.5 |
| Epoch Capabilities Index score | 146 | 150 |
FAQ
Is GLM 5 or GLM 5.1 cheaper?
GLM 5.1 is cheaper on output tokens ($3.04 vs $3.20 per 1M).
Which has the larger context window, GLM 5 or GLM 5.1?
Both models offer a similar context window.
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.