Is GLM-5.1 or OpenAI GPT OSS 120B cheaper?

OpenAI GPT OSS 120B is cheaper on output tokens ($0.25 vs $4.40 per 1M).

Which has the larger context window, GLM-5.1 or OpenAI GPT OSS 120B?

GLM-5.1 has the larger context window (205K tokens).

GLM-5.1 vs OpenAI GPT OSS 120B

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

Spec	GLM-5.1	OpenAI GPT OSS 120B
Provider	NovitaAI	NovitaAI
Input / 1M tokens	$1.40	$0.05
Output / 1M tokens	$4.40	$0.25
Context window	205K	131K
Parameters	754B	117B
Open weights	Yes	Yes
Released	Mar 2026	Aug 2025

GLM-5.1 details →OpenAI GPT OSS 120B details →

FAQ

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