Is GLM 5 or GLM-5.1 cheaper?

GLM 5 is cheaper on output tokens ($3.20 vs $4.40 per 1M).

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

Both models offer a similar context window.

GLM 5 vs GLM-5.1

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

Spec	GLM 5	GLM-5.1
Provider	Weights & Biases	Weights & Biases
Input / 1M tokens	$1.00	$1.40
Output / 1M tokens	$3.20	$4.40
Context window	200K	200K
Parameters	744B	754B
Open weights	Yes	Yes
Released	Feb 2026	Apr 2026

GLM 5 details →GLM-5.1 details →

FAQ

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