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

GPT-OSS 20B is cheaper on output tokens ($0.14 vs $0.40 per 1M).

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

GPT-OSS 120B has the larger context window (131K tokens).

GPT-OSS 120B vs GPT-OSS 20B

GPT-OSS 20B is cheaper on output tokens, while GPT-OSS 120B offers a larger context window. 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	IO.NET	IO.NET
Input / 1M tokens	$0.04	$0.03
Output / 1M tokens	$0.40	$0.14
Context window	131K	64K
Parameters	117B	21B
Open weights	Yes	Yes
Released	Dec 2024	Dec 2024

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.