Is gpt-oss-120b or GLM-5.1 cheaper?

gpt-oss-120b is cheaper on output tokens ($0.60 vs $4.40 per 1M).

Which has the larger context window, gpt-oss-120b or GLM-5.1?

GLM-5.1 has the larger context window (200K tokens).

gpt-oss-120b vs GLM-5.1

gpt-oss-120b is cheaper on output tokens, while GLM-5.1 offers a larger context window. Choose gpt-oss-120b or GLM-5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	gpt-oss-120b	GLM-5.1
Provider	Weights & Biases	Weights & Biases
Input / 1M tokens	$0.15	$1.40
Output / 1M tokens	$0.60	$4.40
Context window	131K	200K
Parameters	117B	754B
Open weights	No	Yes
Released	Aug 2025	Apr 2026

gpt-oss-120b details →GLM-5.1 details →

FAQ

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