Is Nano Banana Pro (Gemini 3 Pro Image) or gpt-oss-20b cheaper?

gpt-oss-20b is cheaper on output tokens ($0.14 vs $12.00 per 1M).

Which has the larger context window, Nano Banana Pro (Gemini 3 Pro Image) or gpt-oss-20b?

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

Nano Banana Pro (Gemini 3 Pro Image) vs gpt-oss-20b

gpt-oss-20b is cheaper on output tokens, while gpt-oss-20b offers a larger context window. Choose Nano Banana Pro (Gemini 3 Pro Image) or gpt-oss-20b based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Nano Banana Pro (Gemini 3 Pro Image)	gpt-oss-20b
Provider	OpenRouter	OpenRouter
Input / 1M tokens	$2.00	$0.03
Output / 1M tokens	$12.00	$0.14
Context window	66K	131K
Parameters	—	21B
Open weights	No	Yes
Released	Jun 2026	Aug 2025

Nano Banana Pro (Gemini 3 Pro Image) 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.