Is GPT OSS 20B or Gemini 3 Pro Image cheaper?

GPT OSS 20B is cheaper on output tokens ($0.15 vs $12.00 per 1M).

Which has the larger context window, GPT OSS 20B or Gemini 3 Pro Image?

Gemini 3 Pro Image has the larger context window (1M tokens).

GPT OSS 20B vs Gemini 3 Pro Image

GPT OSS 20B is cheaper on output tokens, while Gemini 3 Pro Image offers a larger context window. Choose GPT OSS 20B or Gemini 3 Pro Image based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT OSS 20B	Gemini 3 Pro Image
Provider	NanoGPT	NanoGPT
Input / 1M tokens	$0.04	$2.00
Output / 1M tokens	$0.15	$12.00
Context window	128K	1M
Parameters	21B	—
Open weights	No	No
Released	Aug 2025	Nov 2025

GPT OSS 20B details →Gemini 3 Pro Image details →

FAQ

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