Is GLM 5.1 or GLM 5.2 cheaper?

GLM 5.1 and GLM 5.2 have comparable output pricing.

Which has the larger context window, GLM 5.1 or GLM 5.2?

GLM 5.2 has the larger context window (406K tokens).

GLM 5.1 vs GLM 5.2

Both have similar output pricing, while GLM 5.2 offers a larger context window. Choose GLM 5.1 or GLM 5.2 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GLM 5.1	GLM 5.2
Provider	Umans AI	Umans AI
Input / 1M tokens	$1.40	$1.40
Output / 1M tokens	$4.40	$4.40
Context window	205K	406K
Parameters	754B	—
Open weights	Yes	Yes
Released	Apr 2026	Jun 2026

GLM 5.1 details →GLM 5.2 details →

FAQ

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.