Stable Diffusion Prompt That is Too Long

When creating prompts for AI image generation models like Stable Diffusion, it’s important to provide enough detail and context to produce the desired output. However, prompts that are too long can result in the AI getting confused or generating irrelevant images. In this article, we’ll explore tips for writing effective Stable Diffusion prompts, including ideal prompt length and how to condense prompts while retaining key details.

What is an AI Prompt?

An AI prompt is a text description that provides instructions to an AI system on what type of output to generate. For image generation models like Stable Diffusion, the prompt describes the desired image so the model can create it.

Prompts generally contain details like:

  • Subject matter
  • Artistic style
  • Composition
  • Lighting
  • Other visual elements

For example:

A scenic photograph of a winding path through a lush green forest in the Pacific Northwest, digital art

Prompts give the AI model the context needed to generate a relevant image. The more descriptive the prompt, the better the output will match the desired result.

Ideal Stable Diffusion Prompt Length

When writing Stable Diffusion prompts, the ideal length is typically 50-100 words. Going above 100 words starts to introduce issues:

  • The AI has more potential points of confusion
  • Longer compute times to process the prompt
  • Higher likelihood of generating irrelevant images

So for best results, condense your prompt down to the key 50-100 words that matter most.

Why Longer Prompts Cause Problems

As prompts get longer, there’s more potential for:

  • Contradictions – Describing too many different elements that don’t belong together
  • Ambiguity – Using descriptive words that could be interpreted multiple ways
  • Overwhelming the AI – Flooding it with so many details and instructions that it struggles to process everything logically

This mental overload causes the AI to generate less accurate or lower quality images from long prompts.

Tips for Condensing Long Prompts

If your initial prompt concept is too long, use these tips to trim it down:

1. Identify the Core Subject

Strip away extra descriptors and determine the key 1-2 elements that the image absolutely must contain. These will be your subject matter anchor points.

For example, the core of this prompt is “a scenic forest path”:

A scenic winding dirt path through a lush green forest in the Pacific Northwest on a foggy morning, with beams of sunlight streaming through the trees

2. Pick 1-2 Artistic Styles

Choose just one or two dominant styles instead of listing many. For example, “digital art” covers a wide range of styles – picking one helps the AI narrow its focus.

3. Limit Descriptors

Be selective with additional descriptors. Prioritize ones that provide useful context vs. flowery prose that overwhelms the AI. For example, cut “lush green” down to just “green”.

4. Use Broad Lighting/Composition Terms

Rather than detailing a complex scene, use broad terms like “soft lighting” or “background blur”. This gives the AI artistic direction without over-specifying.

Prompt Condensing Example

Here’s how we could condense the previous verbose prompt example into an effective 50-word prompt:

Verbose Prompt

A scenic winding dirt path through a lush green forest in the Pacific Northwest on a foggy morning, with beams of sunlight streaming through the trees and ferns along the path and a background of out-of-focus trees and foliage

Condensed, 50-word Prompt

A scenic forest path digital painting, soft lighting, trees and ferns along the path, sunlight beams streaming down, background trees blurred

This condensed version retains the key subject, style, and composition details in a much more concise prompt.

Helpful Prompt Writing Resources

To learn more about crafting effective Stable Diffusion prompts, check out these helpful resources:


When writing AI prompts for Stable Diffusion, the ideal length is 50-100 words. Exceeding that introduces issues like confusion, long compute times, and irrelevant outputs. By identifying the core subject elements, limiting descriptors, and using broad style terms, you can condense overly long prompts while retaining key details for quality image generation. Check out the resources listed to further develop your Stable Diffusion prompt writing skills.

Useful Websites