Is GLM-5.1 or GLM 5 cheaper?

GLM 5 is cheaper on output tokens ($3.20 vs $4.40 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	Weights & Biases	Weights & Biases
Input / 1M tokens	$1.40	$1.00
Output / 1M tokens	$4.40	$3.20
Context window	200K	200K
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.