Image models in 2026 finally render readable text, so an AI draft can be close to a real poster. The catch is that print still needs exact dimensions, bleed and editable type, so the reliable route is generate, convert to layers, then fix text and size in a design editor.
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Services to know
ChatGPT Images 2.0 (gpt-image-2) · OpenAI
For: Anyone drafting a poster concept
Renders multilingual text, outputs up to 2000 px on the long edge in ratios including 2:3 and 3:1, and can make up to 10 consistent images per request. Thinking mode, which plans layout and checks constraints, is for Plus, Pro and Business users.
Turns a flat PNG or JPG into an editable layered design, restoring text as real text boxes while keeping the layout. Public beta in the US, UK, Canada and Australia; uses your plan's monthly AI allowance.
For: People who prefer to edit by describing changes
Create and edit designs in conversation, such as changing fonts, colors or backgrounds, while keeping the rest intact. Uses Adobe Firefly and third-party models. Beta.
Reference for US sizes: 11x17 for bulletin boards, 18x24 for retail and events, 24x36 for trade shows, 27x40 for movie one-sheets. Recommends 0.125 in bleed, 0.25 in safe zone, 300 DPI up to 24x36, and CMYK files.
Pick the size firstChoose by viewing distance: 11x17 or 18x24 within about 5 feet, 24x36 from 5 to 15 feet. Set up the file with 0.125 in bleed on every side (an 18x24 poster becomes 18.25 x 24.25 in).
Write the copyList the event name, date, time, place, price and a URL or QR target. Ask a chat assistant to cut it to the fewest words that still answer who, what, when and where.
Generate conceptsAsk ChatGPT Images 2.0 for several directions at 2:3 with your exact headline in quotes. Pick one for composition, not for final text.
Make it editableBring the image into Canva and run Magic Layers, or rebuild in Adobe Express. Retype every word, check spelling and keep text 0.25 in inside the trim.
Export for printExport a PDF at 300 DPI (150 DPI is acceptable for larger formats viewed from far away) in CMYK, and order one proof before a full run.
Combinations that work
Combination
Why
ChatGPT Images 2.0 + Canva Magic Layers
Get a strong composition with good text from the model, then make every element editable so you can fix details without regenerating.
Adobe Express AI Assistant + brand assets
Describe changes in plain English while your logo and colors stay put.
Chat assistant copy + design tool
Short, checked copy first means fewer redesigns when someone spots a wrong date.
Limits to keep
Proofread the date, time, address and price yourself. AI text rendering is better, not perfect.
Do not ask for a real artist's style, a celebrity's likeness or another brand's logo. Check each tool's commercial-use terms.
Screens are RGB and print is CMYK. Bright AI colors can print duller, so order a proof.
Canva Magic Layers is still a beta feature and draws on a shared monthly AI allowance.