Stable

Create stunning visuals with AI-powered image generation.

Last updated September 1, 2026

Features

Developer APIs for text-to-image generation with Stable Image Ultra, Core and SD3.5 models
Generative fill (inpainting), outpainting, background removal, object search and replace, and sketch-to-image
Fast, conservative and creative upscaling up to 4K
ControlNet workflows to guide layout, structure and depth
Stackable tools for custom pipelines, such as generate, remove background, upscale
REST API access with credit-based pay-as-you-go usage

💰 Pricing Model

Item Details: Credit-Based Pay-As-You-Go API (1 credit=$0.01) / API Membership Tiers.

General Concept: Charges flat per-generation or per-operation credit fees depending on the specific model endpoint or editing service used.

🆓 Free Access Details

Feature: Free Signup Trial Credits.

Details: New developer accounts receive 25 free credits upon sign-up to test API calls.

Cost: Free ($0) Initial Credits.

💳 Access & Subscription Options (Official Standards)

Access Tier	Price Structure	Primary Workspace Scope & Allowances
🌱 Free Trial	$0 / Free (One-time)	25 free credits on account creation for testing REST APIs.
⚡ Pay-As-You-Go API	Credits top-up ($10 per 1,000 credits)

Stable Image Core: 3 credits ($0.03/img)

SD 3.5 Medium: 3.5 credits ($0.035/img)

Stable Image Ultra: 8 credits ($0.08/img)

Editing/Control: 5 credits per operation

Fast/Creative Upscale: 2 to 60 credits per call.

🚀 API Membership $20.00 / month 6,000 monthly credits, discounted volume access, developer API dashboard.