Fast SDXL API: fal.ai's image-generation model, one key away
Fast SDXL via the ApexApi gateway
A speed-tuned SDXL, and one of the cheapest ways to generate an image here. Good for bulk drafts where cost per render decides the approach. Call it through ApexApi's unified, OpenAI-compatible API with one `ak-` key, alongside every other model in the catalog. Pricing is $0.004/image per image, billed pay-per-use from your credit balance with no subscription.
Fast SDXL is served through ApexApi's unified, OpenAI-compatible API. One key, one format, with smart routing and automatic failover. Provider: fal.ai.
Why Fast SDXL
Text-to-image generation
High-quality image generation (and image-to-image where supported) through one API.
Transparent pricing ($0.004/image)
Pay per image from your credit balance. Failed generations aren't billed.
OpenAI-compatible
Drop-in with any OpenAI SDK. Change the base URL and key, keep your code.
Specifications
- Modality
- image
- Context window
- —
- Max output
- —
- Streaming
- —
- Tool / function calling
- —
- Vision input
- —
Fast SDXL pricing
- That makes it the 1st cheapest of the 29 image models we serve, ranked on output price.
Getting started with Fast SDXL
OpenAI-compatible. Point your client at ApexApi, swap your key, and call it. No new SDK to learn.
import requests
resp = requests.post(
"https://api.apexapi.dev/v1/images/generations",
headers={"Authorization": "Bearer <YOUR_APEXAPI_KEY>"},
json={"model": "stability-ai/fast-sdxl", "prompt": "A serene mountain lake at golden hour"},
)
print(resp.json())Fast SDXL use cases
What teams build with Fast SDXL on ApexApi.
Marketing & creative
On-brand visuals, ad creative, and product imagery at scale.
In-product generation
Generate images inside your app from user prompts.
Prototyping
Rapid concept art and design exploration.
Fast SDXL vs other models
How it compares, and on ApexApi you can switch between any of them with a single string change, same key, same endpoint.
Fast SDXL vs Nano Banana Pro
Compare Fast SDXL against this model on price, capabilities, and latency. A/B them with a single key on ApexApi.
Learn more about Nano Banana Pro API →Fast SDXL vs FLUX.2 Pro
Compare Fast SDXL against this model on price, capabilities, and latency. A/B them with a single key on ApexApi.
Learn more about FLUX.2 Pro API →Fast SDXL API: FAQ
How do I call Fast SDXL through ApexApi?
Create an ApexApi key, point your client at https://api.apexapi.dev/v1, and POST to /v1/images/generations with the model set to `stability-ai/fast-sdxl`. The API is OpenAI-compatible, so an existing OpenAI SDK works once you change the base URL and key.
How much does Fast SDXL cost on ApexApi?
$0.004/image, billed per image with no subscription or minimum. The exact figure is shown before you generate, so nothing is charged against a price you have not seen.
Ready to build with Fast SDXL?
One API key. Every major AI model. Pay only for what you use.
Get your API key, free to start