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 (1M 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	Zhipu AI Coding Plan	Zhipu AI Coding Plan
Input / 1M tokens	$0.00	$0.00
Output / 1M tokens	$0.00	$0.00
Context window	200K	1M
Parameters	754B	—
Open weights	No	Yes
Released	Mar 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.