GLM-4.5 vs GLM-5.1
GLM-4.5 is cheaper on output tokens, while GLM-5.1 offers a larger context window. Choose GLM-4.5 or GLM-5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GLM-4.5 | GLM-5.1 |
|---|---|---|
| Provider | NovitaAI | NovitaAI |
| Input / 1M tokens | $0.60 | $1.40 |
| Output / 1M tokens | $2.20 | $4.40 |
| Context window | 131K | 205K |
| Parameters | 355B | 754B |
| Open weights | Yes | Yes |
| Released | Jul 2025 | Mar 2026 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.