Is GPT-4o (2024-05-13) or gpt-oss-20b cheaper?

gpt-oss-20b is cheaper on output tokens ($0.14 vs $15.00 per 1M).

Which has the larger context window, GPT-4o (2024-05-13) or gpt-oss-20b?

gpt-oss-20b has the larger context window (131K tokens).

GPT-4o (2024-05-13) vs gpt-oss-20b

gpt-oss-20b is cheaper on output tokens, while gpt-oss-20b offers a larger context window. Choose GPT-4o (2024-05-13) or gpt-oss-20b based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-4o (2024-05-13)	gpt-oss-20b
Provider	OpenRouter	OpenRouter
Input / 1M tokens	$5.00	$0.03
Output / 1M tokens	$15.00	$0.14
Context window	128K	131K
Parameters	—	21B
Open weights	No	Yes
Released	May 2024	Aug 2025

GPT-4o (2024-05-13) 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.