Is GLM-5.1 or GLM-5 cheaper?

GLM-5 is cheaper on output tokens ($2.08 vs $3.50 per 1M).

Which has the larger context window, GLM-5.1 or GLM-5?

Both models offer a similar context window.

GLM-5.1 vs GLM-5

GLM-5 is cheaper on output tokens. Choose GLM-5.1 or GLM-5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GLM-5.1	GLM-5
Provider	Deep Infra	Deep Infra
Input / 1M tokens	$1.05	$0.60
Output / 1M tokens	$3.50	$2.08
Context window	203K	203K
Parameters	754B	744B
Open weights	Yes	Yes
Released	Apr 2026	Feb 2026

GLM-5.1 details →GLM-5 details →

FAQ

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