Grok 4 Fast vs GLM 5.2 (Free)
GLM 5.2 (Free) is cheaper on output tokens, while Grok 4 Fast offers a larger context window. Choose Grok 4 Fast or GLM 5.2 (Free) based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Grok 4 Fast | GLM 5.2 (Free) |
|---|---|---|
| Provider | ZenMux | ZenMux |
| Input / 1M tokens | $0.20 | $0.00 |
| Output / 1M tokens | $0.50 | $0.00 |
| Context window | 2M | 1M |
| Parameters | — | — |
| Open weights | No | Yes |
| Released | Sep 2025 | Jun 2026 |
FAQ
Is Grok 4 Fast or GLM 5.2 (Free) cheaper?
GLM 5.2 (Free) is cheaper on output tokens ($0.00 vs $0.50 per 1M).
Which has the larger context window, Grok 4 Fast or GLM 5.2 (Free)?
Grok 4 Fast has the larger context window (2M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.