Posters Are Hard (Text + Layout)
A poster isn't just a pretty image — it's structured layout plus legible text: a headline, supporting copy, a focal visual, and hierarchy that reads at a glance. That combination broke image models for years. In 2026 a few models handle it well. Here's how to generate posters programmatically, all through one API on LinkModel.
Best Models for Posters
- Seedream 5.0 Pro — built for dense layouts and structured design, native text in 14 languages, and layer-separated editing to tweak one element. Cheapest of the three (~$0.0675–0.135) and strong on multilingual posters. The value pick.
- GPT Image 2 — reasoning-first: it plans text placement before rendering, giving near-perfect headlines and reliable complex layouts. Best when the layout logic is intricate. See the prompting guide.
- Nano Banana Pro — ~94% text accuracy, Search grounding, 2K/4K — great for polished, factual, high-res posters.
More on text specifically in best multilingual image model and the image editing guide.
How to Generate a Poster
Quote the exact text, describe the layout regions, and set the style:
curl -X POST https://api.linkmodel.ai/api/v1/image-generation \
-H "Authorization: Bearer $LINKMODEL_API_KEY" -H "Content-Type: application/json" \
-d '{
"model": "seedream-5.0-pro",
"prompt": "Event poster, 2:3. Top: headline \"DESIGN WEEK 2026\". Middle: bold abstract visual. Bottom: \"July 20 · San Francisco\" and a registration button. Tech gradient, clear hierarchy, legible text."
}'Submit, get a task_id and price, poll for the image. Then refine one element (swap a date, recolor) with Seedream's region-precise editing instead of regenerating.
Prompt Tips for Posters
- Quote text verbatim and specify where it goes ("top: …, bottom: …").
- Name the aspect ratio (2:3 portrait posters, 16:9 banners).
- Describe hierarchy ("large headline, small supporting line").
- Set the style and palette up front.
- Verify glyphs for non-Latin scripts — even top models occasionally slip.
- Iterate cheap (Seedream/Nano Banana 2), finalize on the best text model.
Build a Template Workflow
For repeatable poster series (events, product drops, localized versions), generate once, then use layer-separated editing to swap the headline, date, or product per variant — far cheaper and more consistent than regenerating each. Cost tactics in how to reduce AI API costs.
Bottom Line
For AI posters, you need layout + legible text: Seedream 5.0 Pro for value and multilingual layouts, GPT Image 2 for flawless headlines and complex logic, Nano Banana Pro for polished high-res. Quote the text, specify the layout, and template with editing. Full field in best AI image generation APIs.
Start free with a $1 credit and generate your first poster.