Is GPT-4o mini or GPT OSS 20B cheaper?

GPT OSS 20B is cheaper on output tokens ($0.30 vs $0.60 per 1M).

Which has the larger context window, GPT-4o mini or GPT OSS 20B?

Both models offer a similar context window.

GPT-4o mini vs GPT OSS 20B

GPT OSS 20B is cheaper on output tokens. Choose GPT-4o mini or GPT OSS 20B based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-4o mini	GPT OSS 20B
Provider	Cloudflare AI Gateway	Cloudflare AI Gateway
Input / 1M tokens	$0.15	$0.20
Output / 1M tokens	$0.60	$0.30
Context window	128K	128K
Parameters	—	21B
Open weights	No	No
Released	Jul 2024	Aug 2025

GPT-4o mini 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.