Is GPT OSS 120B or GLM-5.3-Flash cheaper?

GLM-5.3-Flash is cheaper on output tokens ($0.54 vs $0.68 per 1M).

Which has the larger context window, GPT OSS 120B or GLM-5.3-Flash?

GLM-5.3-Flash has the larger context window (1M tokens).

GPT OSS 120B vs GLM-5.3-Flash

GLM-5.3-Flash is cheaper on output tokens, while GLM-5.3-Flash offers a larger context window. Choose GPT OSS 120B or GLM-5.3-Flash based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT OSS 120B	GLM-5.3-Flash
Provider	Charm Hyper	Charm Hyper
Input / 1M tokens	$0.18	$0.16
Output / 1M tokens	$0.68	$0.54
Context window	131K	1M
Parameters	—	—
Open weights	Yes	Yes
Released	Apr 2026	Aug 2026

GPT OSS 120B details →GLM-5.3-Flash details →

FAQ

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