Ideally, when you enter a prompt into Midjourney, you will be presented with a set of 4 different images based on how you described it in your prompt. Sometimes you may want Midjourney to create different versions of an image with slightly different descriptions in the prompt. This is where Permutation Prompts come in handy, as they can be used to generate variations of a prompt in such a way that you can create multiple image grids from a single /imagine command.
Midjourney Guide – Create Multiple Image Prompts with Permutations
When you use Permutation Prompts to generate variations, Midjourney processes each of these variations as separate tasks. Because each task on Midjourney consumes a certain number of GPU minutes, you will consume GPU minutes per task when using Permutation Prompts, which will result in you using more GPU minutes than you would for regular image generation. To prevent you from wasting unnecessary GPU minutes, Midjourney displays a confirmation message that you must approve before processing a Permutation Prompt request.
Permutation prompts can be used to create variations of any part of a prompt, such as the text description, parameters, image prompts, and prompt weights. The feature can only be used for prompts that you enter in Quick mode; you cannot use these prompts in Relax or Turbo mode.
The number of tasks you can create each time you use Permutation Prompts depends on the type of subscription you have with Midjourney.