Is GPT-4 Turbo or GLM-4.5 cheaper?

GLM-4.5 is cheaper on output tokens ($2.20 vs $30.00 per 1M).

Which has the larger context window, GPT-4 Turbo or GLM-4.5?

GLM-4.5 has the larger context window (131K tokens).

GPT-4 Turbo vs GLM-4.5

GLM-4.5 is cheaper on output tokens, while GLM-4.5 offers a larger context window. Choose GPT-4 Turbo or GLM-4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-4 Turbo	GLM-4.5
Provider	Impossibl	Impossibl
Input / 1M tokens	$10.00	$0.60
Output / 1M tokens	$30.00	$2.20
Context window	128K	131K
Parameters	—	—
Open weights	No	Yes
Released	Nov 2023	Jul 2025

GPT-4 Turbo details →GLM-4.5 details →

FAQ

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