Is GPT-OSS-120B or GPT-OSS-20B cheaper?

GPT-OSS-20B is cheaper on output tokens ($1.80 vs $4.20 per 1M).

Which has the larger context window, GPT-OSS-120B or GPT-OSS-20B?

Both models offer a similar context window.

GPT-OSS-120B vs GPT-OSS-20B

GPT-OSS-20B is cheaper on output tokens. Choose GPT-OSS-120B or GPT-OSS-20B based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-OSS-120B	GPT-OSS-20B
Provider	Regolo AI	Regolo AI
Input / 1M tokens	$1.00	$0.40
Output / 1M tokens	$4.20	$1.80
Context window	128K	128K
Parameters	117B	21B
Open weights	No	Yes
Released	Aug 2025	Mar 2026

GPT-OSS-120B details →GPT-OSS-20B details →

FAQ

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