Is Nano Banana 2 (Gemini 3.1 Flash Image) or gpt-oss-20b cheaper?

gpt-oss-20b is cheaper on output tokens ($0.14 vs $3.00 per 1M).

Which has the larger context window, Nano Banana 2 (Gemini 3.1 Flash Image) or gpt-oss-20b?

Both models offer a similar context window.

Nano Banana 2 (Gemini 3.1 Flash Image) vs gpt-oss-20b

gpt-oss-20b is cheaper on output tokens. Choose Nano Banana 2 (Gemini 3.1 Flash 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 2 (Gemini 3.1 Flash Image)	gpt-oss-20b
Provider	OpenRouter	OpenRouter
Input / 1M tokens	$0.50	$0.03
Output / 1M tokens	$3.00	$0.14
Context window	131K	131K
Parameters	—	21B
Open weights	No	Yes
Released	Jun 2026	Aug 2025

Nano Banana 2 (Gemini 3.1 Flash 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.