Leonardo AI Negative Prompts: Supported Models + Copy Lists

A negative prompt tells Leonardo what you do not want in the image. Leonardo's help center calls it "a great first defence" against unwanted details such as extra limbs or digits. The catch in 2026: many of the newer models on Leonardo have no negative prompt at all. This page shows where the field is, which models have it, and lists you can paste in.

Where to find the negative prompt field

In the web app's image creation page:

1. Pick a model that supports negative prompts (see the table below).
2. Open Advanced Settings in the side bar.
3. Toggle on Negative Prompt. A second text field appears under the main prompt.

Leonardo's own prompting guide shows these steps with Ideogram 3.0. If you do not see the toggle, the selected model does not take a negative prompt; switch model or use the tips in models without a negative prompt.

In the API, the field is negative_prompt inside parameters:

Which models support negative prompts

From Leonardo's API reference for creating a generation (schema updated 1 September 2026):

Leonardo adds and retires models often, so check the toggle in the app or the API reference if a model is not listed.

Copy-paste negative prompt lists

Write a negative prompt as a list of things, not as a sentence. Do not write "no" or "without" in the negative field: the field already means "not this".

General cleanup

blurry, low quality, lowres, jpeg artifacts, out of focus, overexposed, underexposed, watermark, signature, text, logo

People and portraits

extra fingers, missing fingers, fused fingers, extra hands, extra arms, extra legs, deformed hands, distorted face, asymmetrical eyes, cross-eyed, bad anatomy, long neck

Photorealistic images

cartoon, anime, illustration, painting, drawing, 3d render, cgi, plastic skin, airbrushed, oversaturated

Anime and illustration

photo, photorealistic, 3d, realistic skin texture, blurry lines, messy lineart, extra limbs, bad hands, text, watermark

Product shots and graphic design

text, letters, watermark, logo, cluttered background, harsh shadows, reflections, dust, scratches, cropped product

Landscapes and architecture

people, cars, power lines, text, watermark, tilted horizon, distorted buildings, blurry, overprocessed, hdr halos

Safe-for-work filter

The help center names nudity as a typical thing to keep out with a negative prompt:

nudity, nsfw, gore, blood, revealing clothing

Combine lists as needed, but keep it short. Start with the 3–6 terms for the problem you actually see, then add more only if it stays.

Models without a negative prompt

On Lucid, FLUX, GPT Image, Nano Banana and the other models without the field, put the fix in the main prompt instead. Leonardo's prompting guide also recommends trying a positive prompt first, because negative prompts are soft constraints.

Describe the result you want ("an empty beach") rather than "a beach, no people": the second version still puts "people" in the prompt.

When something still shows up

Leonardo's help center gives this order:

1. Add the unwanted element to the negative prompt.
2. If it still appears, change the model, the aspect ratio, or the style preset.
3. If that does not work, remove it by hand in Canvas: mask the area and regenerate it with a new prompt.

Two notes from the official docs:

• Leonardo says PhotoReal's settings were optimized so that it does not need a negative prompt.
• Negative prompts lower the weight of unwanted terms rather than blocking them, so they make an element less likely, not impossible.

Related guides

For negative prompt lists for Stable Diffusion, SDXL, Pony and Illustrious, see the Stable Diffusion negative prompts guide. For keeping one character the same across images in Leonardo, see the Leonardo consistent characters guide.

Build your prompt

The prompt generator builds the main prompt from subject, style and lighting choices. Add a negative list from this page in Leonardo's Negative Prompt field. It runs in your browser and does not generate images.

Primary sources

• Leonardo help center: Prompting Tips & Tricks (Negative Prompts)
• Leonardo: How to Write Effective AI Image Prompts (Negative Prompt toggle with Ideogram 3.0)
• Leonardo help center: How to Generate Images with Leonardo.Ai
• Leonardo help center: PhotoReal
• Leonardo help center: How To Use Canvas Editor Tool
• Leonardo API reference: Create Async Generation
• Leonardo API docs: Phoenix
• Leonardo API docs: Lucid Origin