Is GPT OSS 120B or GPT-4o mini cheaper?

GPT OSS 120B is cheaper on output tokens ($0.25 vs $0.60 per 1M).

Which has the larger context window, GPT OSS 120B or GPT-4o mini?

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

GPT OSS 120B vs GPT-4o mini

GPT OSS 120B is cheaper on output tokens, while GPT OSS 120B offers a larger context window. Choose GPT OSS 120B or GPT-4o mini based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT OSS 120B	GPT-4o mini
Provider	LLM Gateway	LLM Gateway
Input / 1M tokens	$0.05	$0.15
Output / 1M tokens	$0.25	$0.60
Context window	131K	128K
Parameters	117B	—
Open weights	No	No
Released	Aug 2025	Jul 2024

GPT OSS 120B details →GPT-4o mini details →

FAQ

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