2:1 and 1:2 ratio images: which Sume models list them and the cost

A 2:1 image is a clean banner shape: 2000x1000, 1600x800, a ratio most social headers and slim hero strips can crop from. It is not on every model. Of the 16 model families in Sume's image catalog, 8 list 2:1: black-forest-labs/flux.2-flex, black-forest-labs/flux.2-pro, ideogram/ideogram-v3, ideogram/ideogram-v4.5, qwen/qwen-image, qwen/qwen-image-max, recraft/recraft-v4, x-ai/grok-image.

Models that do not list it: bytedance-seed/seedream-4.5, bytedance-seed/seedream-5-lite, google/imagen-4-fast, google/imagen-4-ultra, google/nano-banana-2.1, google/nano-banana-pro, higgsfield/soul, openai/gpt-image-2.5. Nano Banana 2.1 goes wider than 2:1 (it lists 4:1 and 8:1), so for a banner it is a crop, not a miss.

Who lists 2:1 and what it costs

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.

Choosing

Cheapest is Grok Imagine and Qwen Image at $0.025. Flux 2 Pro at $0.0375 is the lowest price that also takes up to 10 reference images for edits. Grok Imagine and Qwen Image both accept references too, but Qwen Image Max and Recraft V4 are text-to-image only, so use them for fresh art, not for adapting a logo or photo.

Ideogram's two models are the only ones that list both 2:1 and the extreme 3:1 / 1:3 pair, which is the tool for a very tall pin or a very wide strip.

Request

Tall 1:2 works the same way.

{
  "model": "black-forest-labs/flux.2-pro",
  "prompt": "wide hero banner, abstract blue waves, no text",
  "aspect_ratio": "2:1"
}

Source: Sume Image API docs (read 2026-10-07).