Where did you get that info from? According to Google's own docs as well as my own image generation tests via the API, it supports up to 4K natively for gemini-3.1-flash-image-preview (aka NB2).
replyIt just defaults to 1K. But I didn't see anything in the docs stating that it's just a simple upscale for larger resolutions.
https://ai.google.dev/gemini-api/docs/image-generation#gener...
From: https://aistudio.google.com/models/gemini-3-pro-image
reply> Produce production-ready assets with native 1K output and built-in upscaling to 2K and 4K resolutions
The API doc you linked is misleading.
Yeah - if that's true then it's even worse because the output price says
reply $0.067 per 1K image*, $0.101 per 2K image*, and $0.151 per 4K image*.
It's not upscaling for NB2, 4K outputs are very different from 1K, and output tokens count is also different.
reply