Gemini 3 Pro Image (Nano Banana Pro) vs Gemini 3.1 Flash Lite Image

A side-by-side comparison of Gemini 3 Pro Image (Nano Banana Pro) and Gemini 3.1 Flash Lite Image: input/output pricing, capabilities and available endpoints, served live from J8API. Both are reachable with the same API key.

Pricing comparison

ItemGemini 3 Pro Image (Nano Banana Pro)Gemini 3.1 Flash Lite Image
Input (per 1M tokens)$1.5$0.1875
Output (per 1M tokens)$9$1.125

Which should you pick

Which is cheaper, Gemini 3 Pro Image (Nano Banana Pro) or Gemini 3.1 Flash Lite Image?

On input, Gemini 3.1 Flash Lite Image is cheaper ($1.5 vs $0.1875 per 1M tokens). On output, Gemini 3.1 Flash Lite Image is cheaper ($9 vs $1.125 per 1M tokens). All prices are per million tokens in USD.

Can I switch between Gemini 3 Pro Image (Nano Banana Pro) and Gemini 3.1 Flash Lite Image without changing my code?

Yes. Both are available on J8API through one API key and the same OpenAI-compatible endpoint — switching means changing the model field from "gemini-3-pro-image-preview" to "gemini-3.1-flash-lite-image", nothing else.

Both are available on J8API under one API key — switching between them means changing the model field and nothing else, so you can use each where it fits rather than picking one.

Gemini 3 Pro Image (Nano Banana Pro) · Gemini 3.1 Flash Lite Image · All models