stability-ai/stable-diffusion-v3-medium
Stable Diffusion V3 Medium by Stability AI - generate stunning images from text prompts with state-of-the-art AI. Supports multiple aspect ratios, styles, and high-resolution output for creative and commercial use.
Example output — click Run to generate your own
Send your first request
OpenAI-compatible endpoint with unified authentication and usage tracking.
https://api.sandbase.ai/v1/runstability-ai/stable-diffusion-v3-mediumInput Schema
6 parameters · 1 required · 5 optional
| Parameter | Type | Required | Description |
|---|---|---|---|
prompt | string | Required | The prompt to generate an image from. |
seed | integer | Optional | The same seed and the same prompt given to the same version of Stable Diffusion will output the same image every time. |
aspect_ratio | string | Optional | The aspect ratio of the generated image. · Options: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16 21:916:93:24:35:41:14:53:42:39:16 |
guidance_scale | number | Optional | The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt when looking for a related image to show you. · Min: 0 · Max: 20 · Default: 5 |
prompt_expansion | boolean | Optional | If set to true, prompt will be upsampled with more details. · Default: false |
num_inference_steps | integer | Optional | The number of inference steps to perform. · Min: 1 · Max: 50 · Default: 28 |
Output Schema
| Field | Type | Description |
|---|---|---|
id | string | Unique identifier for the generation task |
status | string | Task status: pending, running, completed, failed, timeout |
model | string | Model used for the generation |
outputs | array | Array of output items |
outputs[].url | string | URL of the generated artifact |
outputs[].content_type | string | MIME type (e.g. image/png, video/mp4) |
error | object | null | Error details if failed, null on success |
error.type | string | Machine-readable error type code |
error.message | string | Human-readable error description |
Async Workflow
This model uses asynchronous execution. Submit a request and poll for the result.
- Submit — POST to /v1/run, receive an
id - Poll — GET /v1/run/{id} until status is
completed,failed, ortimeout - Retrieve — Read
outputsfrom the completed response
Code Examples
Ready-to-run snippets
# Step 1: Submit
curl -X POST https://api.sandbase.ai/v1/run \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "stability-ai/stable-diffusion-v3-medium",
"prompt": "Digital art, portrait of an anthropomorphic roaring Tiger warrior with full armor, close up in the middle of a battle, behind him there is a banner with the text \"Open Source\"",
"guidance_scale": 5,
"prompt_expansion": false,
"num_inference_steps": 28
}'
# Step 2: Poll result (replace <id>)
curl https://api.sandbase.ai/v1/run/<id> \
-H "Authorization: Bearer YOUR_API_KEY"API README
Stable Diffusion V3
Stable Diffusion V3 occupies a clearly bounded position in a image production pipeline under the route stability-ai/stable-diffusion-v3-medium. It is best evaluated as a named workflow endpoint rather than as a generic substitute for neighboring versions: planners can assign the route to a specific brief, record the chosen revision, and keep approval history tied to one predictable integration surface from intake through delivery.
A practical rollout of Stable Diffusion V3 should begin with source-readiness checks, ownership of the submitted material, an agreed budget, and a written definition of the final stable diffusion v3 medium deliverable. Before automation is enabled, the acceptance pass should verify that the returned asset opens correctly, fits the intended downstream toolchain, satisfies the project’s review criteria, and can be reproduced from the stored request and route identity stability-ai/stable-diffusion-v3-medium.
Highlights
- Distinct output behavior. For Stable Diffusion V3, for Stable Diffusion V3, begin with text and no uploaded source image In Stable Diffusion V3, this capability is applied through the exact stability-ai/stable-diffusion-v3-medium workflow with seed as a relevant request control; the seed control exposes the corresponding choice in this route; the seed control exposes the corresponding choice in this route.
- Creative control. For Stable Diffusion V3, for Stable Diffusion V3, optionally upsample the prompt with more details In Stable Diffusion V3, this capability is applied through the exact stability-ai/stable-diffusion-v3-medium workflow with prompt as a relevant request control; the prompt control exposes the corresponding choice in this route; the prompt control exposes the corresponding choice in this route.
- Workflow fit. For Stable Diffusion V3, for Stable Diffusion V3, set inference steps from 1 through 50 In Stable Diffusion V3, this capability is applied through the exact stability-ai/stable-diffusion-v3-medium workflow with aspect ratio as a relevant request control; the aspect ratio control exposes the corresponding choice in this route; the aspect ratio control exposes the corresponding choice in this route.
- Production detail. For Stable Diffusion V3, for Stable Diffusion V3, adjust CFG scale between 0 and 20 In Stable Diffusion V3, this capability is applied through the exact stability-ai/stable-diffusion-v3-medium workflow with guidance scale as a relevant request control; the guidance scale control exposes the corresponding choice in this route; the guidance scale control exposes the corresponding choice in this route.
Pricing
| Configuration | Price |
|---|---|
| Per request | $0.035 |
When to Use
| Scenario | Why this model fits |
|---|---|
| Choose Stable Diffusion V3 | Use it when the required deliverable is specifically the image result documented for stability-ai/stable-diffusion-v3-medium. |
| Match the source material | Select this route when your inputs naturally map to seed, prompt, aspect_ratio, guidance_scale. |
| Use its distinguishing capability | For Stable Diffusion V3, begin with text and no uploaded source image In Stable Diffusion V3, this capability is applied through the exact stability-ai/stable-diffusion-v3-medium workflow with seed as a relevant request control; the seed control exposes the corresponding choice in this route |
| Plan repeatable production | For Stable Diffusion V3, optionally upsample the prompt with more details In Stable Diffusion V3, this capability is applied through the exact stability-ai/stable-diffusion-v3-medium workflow with prompt as a relevant request control; the prompt control exposes the corresponding choice in this route |
| Confirm cost and delivery | Use the pricing combinations below and the output contract above when budgeting or automating Stable Diffusion V3 jobs. |
Prompt Guide
Build the request around the exact stability-ai/stable-diffusion-v3-medium schema. Start with required fields, then add only the controls needed for the intended output; keep URLs reachable and enum values exactly as shown in Technical Specs.
{
"prompt": "Digital art, portrait of an anthropomorphic roaring Tiger warrior with full armor, close up in the middle of a battle, behind him there is a banner with the text \"Open Source\"",
"seed": 0,
"aspect_ratio": "21:9",
"guidance_scale": 5
}
Technical Specs
| Specification | Value |
|---|---|
| Model ID | stability-ai/stable-diffusion-v3-medium |
| Execution mode | async |
| Required inputs | prompt |
| Request fields | seed (integer, optional); prompt (string, required); aspect_ratio (string, optional, options: 21:9 / 16:9 / 3:2 / 4:3 / 5:4 / 1:1 / 4:5 / 3:4 / 2:3 / 9:16); guidance_scale (number, optional, min 0, max 20); prompt_expansion (boolean, optional); num_inference_steps (integer, optional, min 1, max 50) |
| Output | url (string); content_type (string) |