Is OpenAI GPT-OSS 20b or OpenAI GPT-5 Mini cheaper?

OpenAI GPT-OSS 20b is cheaper on output tokens ($0.20 vs $2.00 per 1M).

Which has the larger context window, OpenAI GPT-OSS 20b or OpenAI GPT-5 Mini?

OpenAI GPT-5 Mini has the larger context window (400K tokens).

OpenAI GPT-OSS 20b vs OpenAI GPT-5 Mini

OpenAI GPT-OSS 20b is cheaper on output tokens, while OpenAI GPT-5 Mini offers a larger context window. Choose OpenAI GPT-OSS 20b or OpenAI GPT-5 Mini based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	OpenAI GPT-OSS 20b	OpenAI GPT-5 Mini
Provider	Helicone	Helicone
Input / 1M tokens	$0.05	$0.25
Output / 1M tokens	$0.20	$2.00
Context window	131K	400K
Parameters	21B	—
Open weights	No	No
Released	Jun 2024	Jan 2025

OpenAI GPT-OSS 20b details →OpenAI GPT-5 Mini details →

FAQ

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