How to fix misspelled text on an AI poster

Why AI posters get the words wrong

Image models draw letters as part of the picture, so a headline is pixels, not text you can retype. Current models get short copy right most of the time: in our test of 64 promo posters, the only misspellings were in a street name. But a poster only has to be wrong once, and OpenAI’s own image generation guide says its model “can still struggle with precise text placement and clarity.”

Ask for the text the right way

These habits help in every tool, and the model makers recommend most of them:

• Put the exact words in quotation marks, for example: a headline that reads “Grand Opening”.
• Say where each piece of text goes and how it looks: “bold white sans-serif across the top”.
• Keep the copy short. One headline and one detail line is far safer than a paragraph of small print.
• Spell out dates and prices exactly as they should appear, including the currency symbol.

In ChatGPT

Keep the poster in the same chat. Select the area with the wrong text if the edit tool is available, then type the correction in quotes and say what must not change, for example: change the headline to “Grand Opening Saturday” and keep the font, size, color and everything else exactly the same.

OpenAI’s developer documentation says its models use a selected area as guidance and may not follow its exact shape. A text fix can spill into the product or the background, so check the whole poster after every edit, not just the word you changed.

In Gemini or another Nano Banana tool

Describe the change in words. Google’s Nano Banana prompting guide calls this masking through text and recommends being explicit about what to keep exactly the same. Name the text you want changed, give the new wording in quotes and list what has to stay.

The same guide suggests settling the wording in conversation first and only then asking for the image with that text. On the next poster, agree on the headline before you generate.

In FLUX

Black Forest Labs’ FLUX prompting guide recommends putting the exact words in quotes, describing where they go and how they look, and making one change per edit so you can see what each instruction did. Use a line break inside the quotes to split a headline across two lines.

When to stop re-rolling

If two or three tries haven’t fixed it, each new attempt is as likely to change something you liked, and in most tools every attempt costs credits. Take the text out of the picture instead:

1. Ask the same tool for the same poster with no text at all, keeping everything else the same.
2. Open the text-free version in a design tool—or drop it straight into our free Google Font text overlay tool—and set the headline, date and price as real text.
3. Save the text-free artwork, so the next change is a retype instead of a regeneration.

How Prismind avoids the problem

Prismind generates the artwork with FLUX 3 and leaves the words out of the picture. Your headline, date and price are set as live text on top, so a typo is a retype and the artwork never changes. How live text works · Prismind and Canva compared

Check before you post

• Your business name and any product names, letter by letter.
• Dates against a calendar, including the day of the week.
• Prices, currency symbols and percentages.
• Phone numbers, web addresses and social handles.
• Small print that’s easy to skip, such as terms, addresses and opening hours.