At a glance
The Stable Diffusion v3.5 Large API runs Stable Diffusion v3.5 Large through Mage at POST https://api.mage.space/v1/stable_diffusion_v35_large/generate. A request at the default settings costs 10 Gems (about $0.01), with no subscription. Stable Diffusion v3.5 Large takes no @handle mentions.
Image
Output
1
Variant
10
Gems per image, default
$0.01
About, in USD
Overview
What the Stable Diffusion v3.5 Large API does
The Stable Diffusion that follows detailed prompts most closely. Text-to-image or from one input image, at a budget price.
Stable Diffusion 3.5 Large, the Stable Diffusion that follows detailed prompts most closely, with an optional input image.
It accepts image as inputs.
Quick start
Call the Stable Diffusion v3.5 Large API
Set MAGE_API_KEY, submit to /stable_diffusion_v35_large/generate, and poll status_url until the request completes.
cURL
STATUS_URL=$(curl --request POST 'https://api.mage.space/v1/stable_diffusion_v35_large/generate' \
--header "Authorization: Bearer $MAGE_API_KEY" \
--header 'Content-Type: application/json' \
--data '{
"prompt": "Editorial portrait in soft daylight, 35mm film look",
"aspect_ratio": "4:5",
"model_id": "sd-3-5-large"
}' | jq -r '.status_url')
# Repeat until status is "completed"; result.url is the file
curl "$STATUS_URL" --header "Authorization: Bearer $MAGE_API_KEY"Python
import os, time, requests
headers = {"Authorization": f"Bearer {os.environ['MAGE_API_KEY']}"}
request = requests.post(
"https://api.mage.space/v1/stable_diffusion_v35_large/generate",
headers=headers,
json={
"prompt": "Editorial portrait in soft daylight, 35mm film look",
"aspect_ratio": "4:5",
"model_id": "sd-3-5-large"
},
).json()
while request["status"] in ("queued", "in_progress"):
time.sleep(3)
request = requests.get(request["status_url"], headers=headers).json()
print(request["status"], request["result"] and request["result"]["url"])JavaScript
const headers = {
Authorization: `Bearer ${process.env.MAGE_API_KEY}`,
'Content-Type': 'application/json',
};
let request = await fetch('https://api.mage.space/v1/stable_diffusion_v35_large/generate', {
method: 'POST',
headers,
body: JSON.stringify({
"prompt": "Editorial portrait in soft daylight, 35mm film look",
"aspect_ratio": "4:5",
"model_id": "sd-3-5-large"
}),
}).then((response) => response.json());
while (['queued', 'in_progress'].includes(request.status)) {
await new Promise((resolve) => setTimeout(resolve, 3000));
request = await fetch(request.status_url, { headers }).then((r) => r.json());
}
console.log(request.status, request.result?.url);Models
Stable Diffusion v3.5 Large model_id values
Send model_id to pick a variant. A request without one runs the default.
| model_id | Name | Default |
|---|---|---|
| sd-3-5-large | Stable Diffusion v3.5 Large | Yes |
Options
Stable Diffusion v3.5 Large parameters
Allowed values across all variants; a variant may offer fewer. The docs list the options per variant.
| Field | Values |
|---|---|
| aspect_ratio | 21:9, 16:9, 3:2, 5:4, 1:1, 4:5, 2:3, 9:16, 9:21 |
Inputs
Media inputs Stable Diffusion v3.5 Large accepts
Send each as an https URL, a data URL, or an upload of up to 100 MB.
| Field | Role |
|---|---|
| image | The reference image. |
More image models
Other image generation APIs on Mage
Image · from 10 Gems
Stable Diffusion XL API
Photoreal-tuned SDXL
Image · from 10 Gems
Z-Image API
The fastest image model on Mage
Image · from 20 Gems
Anima API
Purpose-built for anime
Image · from 35 Gems
Chroma API
Open-weights, built on Flux
Image · from 40 Gems
Flux 2 API
Long prompts and multi-reference edits
Image · from 9 Gems
GPT Image 2 API
Precise prompts and readable text
FAQ
Frequently asked questions
How much does the Stable Diffusion v3.5 Large API cost?
A Stable Diffusion v3.5 Large request at the default settings (Stable Diffusion v3.5 Large) costs 10 Gems, about $0.01. Other resolutions, durations, and variants change the price; the response reports the exact charge. A generation that fails is refunded; one Mage's content policy blocks is not.
What is the Stable Diffusion v3.5 Large API endpoint?
POST https://api.mage.space/v1/stable_diffusion_v35_large/generate with an Authorization: Bearer header carrying your Mage API key. The response includes a status_url to poll for the result.
Which Stable Diffusion v3.5 Large models can I call?
sd-3-5-large. The default is Stable Diffusion v3.5 Large.
Does Stable Diffusion v3.5 Large support reference images or characters?
Stable Diffusion v3.5 Large accepts image. Stable Diffusion v3.5 Large takes no @handle mentions.
Can I use Stable Diffusion v3.5 Large from Claude or ChatGPT?
Yes. Connect the Mage MCP server to Claude, ChatGPT, Claude Code, Grok, or Cursor and ask for Stable Diffusion v3.5 Large by name. Your assistant reads its options with get_model and quotes the price before it generates.
How long are Stable Diffusion v3.5 Large results kept?
Results and inputs are kept for 30 days. Download anything you want to keep to your own storage.
Start building with Mage
One account, one Gems balance, every model. Pay only for what you generate.