Is GPT OSS 120B or GLM 4.5 cheaper?

GPT OSS 120B is cheaper on output tokens ($0.25 vs $1.30 per 1M).

Which has the larger context window, GPT OSS 120B or GLM 4.5?

Both models offer a similar context window.

GPT OSS 120B vs GLM 4.5

GPT OSS 120B is cheaper on output tokens. Choose GPT OSS 120B or GLM 4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT OSS 120B	GLM 4.5
Provider	NanoGPT	NanoGPT
Input / 1M tokens	$0.05	$0.30
Output / 1M tokens	$0.25	$1.30
Context window	128K	128K
Parameters	117B	355B
Open weights	No	No
Released	Aug 2025	Apr 2025

GPT OSS 120B 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.