In our testing for product posters, ChatGPT Image follows a planned layout and renders headline text most reliably, so it's Poster Grammar's default. Ideogram is a strong second for type-heavy designs. The bigger difference, though, is the prompt: any of these models produces a generic poster if the prompt doesn't fix the layout, the copy and the light.
We make Poster Grammar, which lets you generate with several of these models in one place. What follows is based on our own poster tests, not on a published benchmark.
When a prompt says only "an ad for my moisturiser", every model falls back on the same defaults: a centred product, a warm glow and text wherever it fits. That's why so many AI ads look alike. Decide the layout first, with product position, headline area and empty space, then describe the light as the camera sees it. That improves results on every model. Read: why AI posters all look the same.
Attach a photo of the real product and tell the model to keep its shape, label, logo, colours and printed text. Poster Grammar adds this instruction automatically whenever you upload a product photo.
For product posters, ChatGPT Image follows layouts and renders headline text most reliably in our tests. Ideogram is strong for typography-led designs. A planned layout in the prompt matters more than which model you pick.
ChatGPT Image and Seedream give realistic product shots. Describe the scene, surface and the light as the camera sees it, and attach your real product photo so the label and colours stay correct.
Yes. Poster Grammar lets you generate with ChatGPT Image, Google Nano Banana, Ideogram, Recraft, Seedream and others from the same design, and shows the credit cost before each generation.
Bring a product photo. 12 free credits, no card.
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