8x10 inch print from an AI image: dpi by Sume model at 4:5

An 8x10 inch print is a 4:5 portrait (10 inches on the long side). The question is how many pixels each model hands back at 4:5, because dpi is just long-side pixels divided by 10. Sume lists 4:5 for GPT Image 2.5, Nano Banana Pro and 2.1, the Seedream models, Flux 2, Qwen, Recraft and both Ideogram versions; Imagen 4 and Grok do not list it.

Sume's own catalog code fixes the native 4:5 sizes: GPT Image 2.5 serves 1024x1280 for the preset, Seedream 5 Lite serves 1920x2400, the generic custom-pixel models (Flux, Qwen, Recraft) cap the long side at 1536, and Nano Banana Pro's 1K tier is about 928x1152. Read 2026-10-07.

Pixels, dpi and price at 8x10

Prices here are Sume's list-times-1.25 figures. The catalog states the billable formula as "list × 1.25 → ceil usd cents", so treat the dollar amounts as the pre-rounding value and read the exact charge from billable_amount_usd_micros in the submit envelope. Failed or cancelled generations are not billed.

Getting to 300 dpi

Only GPT Image 2.5 takes custom pixels large enough to reach 300 dpi at 8x10 without upscaling. 2400x3000 is the exact target, but 3000 is not a multiple of 16, so the nearest legal box is 2400x3008, which is 7.2 megapixels and inside the 8,294,400 cap. Trim the extra 8 pixels in your layout tool. The price jumps because output tokens scale with area: $0.0395 at medium versus $0.01425 at the preset.

For 200 to 240 dpi, which is fine for most home and office printers viewed at arm's length, Seedream 5 Lite at 240 dpi and $0.04375 per image is the cheapest route that needs no custom size at all. Anything under about 150 dpi (Flux 2 at 154, Nano Banana Pro at 115) is a screen or a small frame, not a wall print.

Do not use the large 4K tiers just to chase dpi on an 8x10: you pay for pixels you cannot print.

Request for the 300 dpi path

image_size takes priority over aspect_ratio; send only one.

{
  "model": "openai/gpt-image-2.5",
  "prompt": "botanical illustration of a fern, cream background",
  "quality": "medium",
  "image_size": { "width": 2400, "height": 3008 }
}

Expect this size to be a candidate for the 202 job envelope; read the result from GET /v1/jobs/{id}/result when it comes. Source: Sume Image API docs (read 2026-10-07).