Is GPT OSS 120B or gpt-oss-20b cheaper?

gpt-oss-20b is cheaper on output tokens ($0.14 vs $0.15 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	OpenRouter	OpenRouter
Input / 1M tokens	$0.03	$0.03
Output / 1M tokens	$0.15	$0.14
Context window	131K	131K
Parameters	117B	21B
Open weights	Yes	Yes
Released	Aug 2025	Aug 2025

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.