21:9 panoramas, croppable to 32:9
Describe a panorama and Nano Banana 2 paints it at 21:9, up to 6336 × 2688 pixels, so a 3440 × 1440 ultrawide shows it without stretching.
The ultrawide wallpaper generator makes 21:9 panoramas with Nano Banana 2: 3168 × 1344 at 2K or 6336 × 2688 at 4K, for 20 credits each. At 4K that covers 3440 × 1440 and 5120 × 2160 ultrawide monitors, and a 4K panorama cropped to 6336 × 1782 covers a 5120 × 1440 super-ultrawide or two 1440p monitors side by side. Seedream 4.5 offers no 21:9 size here.
The model draws the panorama at 21:9 from the start, so you are not stretching a 16:9 image or leaving black bars at the sides.
Every 21:9 request asks the model to spread the scene across the full width, with the focal point near the center, where your eyes rest.
At 4K the image is 6336 × 2688; crop it to 6336 × 1782 and it covers a 5120 × 1440 super-ultrawide or two 1440p monitors.
6,336 pixels across keep fine detail on large curved screens, for the same 20 credits as at 2K.
Landscapes, skylines and skies that continue to both sides work best.
The page starts on these settings; Seedream 4.5 does not offer 21:9 here.
Set it with Fill; for a 32:9 screen, crop the top and bottom first.
Monitors sold as 21:9 are a little wider than exact 21:9, and a 4K panorama of 6336 × 2688 covers each of these with Fill:
Super-ultrawide monitors and two 16:9 monitors side by side are both 32:9, wider than any shape the models make directly. Make a 21:9 panorama at 4K and crop it:
A 21:9 frame is more than twice as wide as it is tall, so think in landscapes:
Seedream 4.5 has a 21:9 size at 2K only, so the generator offers 21:9 with Nano Banana 2, which has it at both 2K and 4K. Every other shape works with both models.
Yes, at 4K. The panorama is 6336 × 2688; with Fill, the monitor scales it down to its width and trims a few pixels from the top and bottom. The 2K size, 3168 × 1344, is slightly smaller than that screen, so pick 4K.
Not directly. Make a 21:9 panorama at 4K and crop it to 6336 × 1782: that covers a 5120 × 1440 or a 3840 × 1080 super-ultrawide.
Yes, for two monitors of the same size side by side: crop a 4K panorama to 32:9 and choose Span in the Windows background settings. On a Mac, set the left half on one display and the right half on the other.
20 credits per wallpaper with Nano Banana 2, at 2K or 4K, about $0.18–$0.25 depending on the plan or pack; the smallest pack is $4.99 for 400 credits. Signing up is free; there are no free trial credits.
Last updated October 23, 2026
