Is GLM-5.1 or GPT OSS 120B cheaper?

GPT OSS 120B is cheaper on output tokens ($0.15 vs $3.08 per 1M).

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

GLM-5.1 has the larger context window (203K tokens).

GLM-5.1 vs GPT OSS 120B

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

Spec	GLM-5.1	GPT OSS 120B
Provider	OpenRouter	OpenRouter
Input / 1M tokens	$0.98	$0.03
Output / 1M tokens	$3.08	$0.15
Context window	203K	131K
Parameters	754B	117B
Open weights	Yes	Yes
Released	Apr 2026	Aug 2025

GLM-5.1 details →GPT OSS 120B details →

FAQ

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