# Faster, sharper ad images — and they finally come back the right shape

> Campaign images now render in about a third of the time, at the exact proportions you asked for, and follow the do's and don'ts in your brand kit.

Version: v1.589
Date: 2026-09-17
Source: https://doc.checkgrow.com/changelog/v1-589-faster-sharper-ad-images-and-they-finally-come-back-the-right-shape

## What this solves

Whichever size you picked, the image came back as one of three fixed shapes. A 1200×628 Facebook link ad was generated as a 3:2 rectangle instead of the 1.91:1 banner the placement needs, so the composition was framed for a shape the ad slot never uses. Four of the five sizes were affected.

The other problem was the wait: a single image regularly took over a minute.

## What changed

**A new default engine.** GPT Image 2.5 Flare replaces Nano Banana 2 as the default. In our testing it produced an image in about 9 seconds where the previous OpenAI engine took 30 — three times faster, at a lower cost. GPT Image 2.5 Sunburst is there for detailed scenes and precise text, and every engine you used before is still in the list.

**Images match the size you choose.** Each size now renders at its own proportions and at a higher resolution — a 1200×1200 square is generated as a true 1200×1200, not scaled up from something smaller.

**Your brand's visual rules reach the image.** If your brand kit records art direction — "never use busy patterns or gradients", "photography of real skin and products is preferred" — those rules are now given to the image engine as hard constraints, along with your full colour palette and your real brand fonts.

**A credit estimate you can trust.** The panel used to show a flat "5 credits" for every engine. It now shows a realistic estimate for the engine you picked, marked with a "~", because the true cost depends on the engine, the image size and whether the image needed a correction pass.

## Where to find it

Campaigns → open any creative → the image panel, under **Settings**.

## Useful for

Anyone producing paid social or display creative across several placements at once — a story, a square feed post and a wide banner now each come back correctly framed, instead of needing a crop.