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Stable Diffusion

Stable Diffusion is a state-of-the-art deep learning model designed for generating high-quality images from textual descriptions. It utilizes a latent diffusion process, a type of generative model that iteratively refines noise to produce detailed and realistic images. This model is highly efficient, scalable, and capable of running on consumer-grade hardware, making it widely used for applications in art generation, content creation, and research. Developed with open accessibility in mind, Stable Diffusion empowers developers and creators to explore generative AI while maintaining adaptability for various use cases.

Apolo uses SD.Next as the WebUI for the Stable Diffusion application.

SD.Next is a browser-based interface designed for generating and managing AI-generated images using Stable Diffusion and other models. It offers several customization options, advanced image settings, and integrations for various Stable Diffusion models, enabling users to create and edit images with ease. It also provides an API for generating images which can be integrated into other applications.

Key Features

Feature

How the Apolo App Helps

Text‑to‑Image & Image‑to‑Image

Prompt → image or edit existing images via Web UI or REST.

Custom Models

Point to any Hugging Face model (stabilityai/stable-diffusion‑xl, lora/…).

GPU Presets

Pick from gpu-l4-x1, gpu-a100-x1, etc.; Apolo sets env vars & drivers.

Secrets Integration

Store HF tokens in Apolo Secrets instead of plain text.

Scalable Replicas

replica_count lets you handle bursty image queues.

Installing

Stable Diffusion can be installed on Apolo either via the CLI or the Apolo Console. Below are the detailed instructions for installing Stable Diffusion using Apolo Console.

Installing via Apolo Console

1 · Open the catalogue

2 · Configure the wizard

Section

Field

Example

Notes

Enable HTTP Ingress

auth = true

Adds basic‑auth to the public URL.

Resource Preset

gpu-a100-x1

1× NVIDIA A100 80 GB (or choose gpu-l4-x1, etc.).

Stable Diffusion

replica_count = 1

Increase for concurrent jobs.

Hugging Face Model

stabilityai/stable-diffusion-2-1-unclip-small

Any HF repo path.

HF Token

Secret HF_TOKEN

Needed for private or gated models.

Click Install. Wait until Status → healthy; copy the external_api host (REST) or open the Web UI at https://sd-<id>.apps.<cluster>.apolo.us.

Usage

After installation, you can utilize Stable Diffusion for image generation workflows and you can access it directly from your browser or using its Rest API

To view and manage installed instances of the Stable Diffusion app:

  1. Go to the Installed Apps tab.

  2. You will see a list of all running apps, including the Stable Diffusion app you just installed. To open the detailed information & uninstall the app, click the Details button.

Once in the Details" page, scroll down to the Outputs sections. To launch the applications, find the HTTP API output with with the public domain address, copy and open it in a dedicated browser window.

1 · REST API

Once the app is healthy Apolo exposes auto‑generated Swagger docs at:

https://<APP_HOST>/docs

txt2img endpoint

curl -X POST \
  -H "Authorization: Basic $(apolo config show-token)" \
  -H "accept: application/json" \
  -H "Content-Type: application/json" \
  -d '{
        "prompt": "Some prompt"
      }' \

The response contains a base64‑encoded PNG under images[0].

2 · Web UIs

  • SD.Next WebUI – the default root path (/).

References

PreviousFooocusNextHugging Face

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