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Nano Banana 2 only supports 1K resolution (1024x1024) natively. Anything above that is upscaling. So this matches SDXL. GPT Image 2 does support 4k natively (bu

• vunderba 5mo ago
  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). It 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#generate-4k-images https://ai.google.dev/gemini-api/docs/image-generation#gener...
  • gpt5 5mo ago
    From: https://aistudio.google.com/models/gemini-3-pro-image https://aistudio.google.com/models/gemini-3-pro-image > Produce production-ready assets with native 1K output and built-in upscaling to 2K and 4K resolutions The API doc you linked is misleading.
    • vunderba 5mo ago
      Yeah - if that's true then it's even worse because the output price says $0.067 per 1K image*, $0.101 per 2K image*, and $0.151 per 4K image*. But if all the "compute time" is spent on a 1K image and they're just passing it to a ESRGAN or other upscaling technique, then there’s literally zero reason to generate anything above 1K. Just save the money and upscale it yourself.
• Tiberium 5mo ago
  It's not upscaling for NB2, 4K outputs are very different from 1K, and output tokens count is also different.