Is GPT-4 Turbo Preview or GLM 4.5 cheaper?

GLM 4.5 is cheaper on output tokens ($1.30 vs $30.00 per 1M).

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

Both models offer a similar context window.

GPT-4 Turbo Preview vs GLM 4.5

GLM 4.5 is cheaper on output tokens. Choose GPT-4 Turbo Preview 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 Preview	GLM 4.5
Provider	NanoGPT	NanoGPT
Input / 1M tokens	$10.00	$0.30
Output / 1M tokens	$30.00	$1.30
Context window	128K	128K
Parameters	—	355B
Open weights	No	No
Released	Nov 2023	Apr 2025

GPT-4 Turbo Preview 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.