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?

GLM-5.1 has the larger context window (205K tokens).

GLM-5.1 vs GLM-5

GLM-5 is cheaper on output tokens, while GLM-5.1 offers a larger context window. 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	NovitaAI	NovitaAI
Input / 1M tokens	$1.40	$1.00
Output / 1M tokens	$4.40	$3.20
Context window	205K	203K
Parameters	754B	744B
Open weights	Yes	Yes
Released	Mar 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.