Ideogram ad resizer API safe zones vs Sume aspect_ratio 4:5

Ideogram's ad resizer reframes an ad to an exact WIDTHxHEIGHT and, with platform, keeps it inside that platform's safe zone. Sume's image docs describe no safe-zone parameter: you choose an aspect_ratio and a resolution tier (512, 1K, 2K, 4K), and exact pixels are not guaranteed.

Ideogram facts are from its ad resizer page; Sume facts are from Image models, read 2026-10-01.

What does the Ideogram ad resizer guarantee?

Per the page, each output image has exactly the requested pixel dimensions, with or without a platform. With platform, the ad is generated inside the largest rectangle that fits that platform's safe zone for the requested ratio, and the surrounding space is filled in. A resolution outside the platform's accepted list is rejected with a 400.

What does Sume offer for ad-shaped images?

Normalized fields: resolution is a tier of 512, 1K, 2K or 4K, and aspect_ratio includes 1:1, 16:9, 9:16, 4:5 and others. The docs note that 4:5 is Instagram portrait (1080x1350), not 4:3, and that a model only accepts the values its catalog lists. They also say not to put custom pixels on size.

Can Sume hit 1080x1350 exactly?

The docs say one model sends aspect_ratio: "4:5" at a native size of about 928x1152 at 1K, and that exact 1080x1350 is a documented post-step via job target_pixels. See the 1080x1350 post before relying on exact pixels; there is no per-platform safe-zone control to lean on, so keep key text away from the edges yourself.

How do I resize an existing ad on Sume?

For edit and image-to-image calls, prefer aspect_ratio: "auto" to match the reference; omitting the field is not the same as auto. A parameter the model does not list is rejected with 400 unsupported_parameter, so there is no silent platform fallback. Check the output dimensions before you upload to an ad platform.