Cost-effective Image Prompt Writing

While Stable Diffusion and Midjourney are popular image generation AIs, this lesson will focus on DALL-E, the image generation AI model used by ChatGPT, specifically the latest model, DALL-E-3.

1. Square (1:1) : 1024 x 1024

2. Landscape (7:4) : 1792 x 1024

3. Portrait (4:7) : 1024 x 1792

The default aspect ratio for most image-generating AIs, including DALL-E 3, is 1:1 (Square).

For blog post cover images, which typically use a wider format, it is recommended to specify 7:4 aspect ratio or Landscape in your prompt.

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Blog post cover image depicting the concept of taming ChatGPT through prompt engineering

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Blog post cover image depicting the concept of taming ChatGPT through prompt engineering, with a 7:4 aspect ratio

Note that you can use a comma (,) when adding an aspect ratio to the prompt, or you can write it as a narrative sentence without a comma.

These separators, such as commas in a prompt, are commonly referred to as Delimiters.

Using delimiters like commas or periods to structure prompts clearly helps the AI better interpret and meet the requirements, reducing misunderstandings.