Stable Diffusion

Stable Diffusion is Stability AI’s family of generative image models and related developer services, rather than one single consumer app. The current Stability AI platform includes Stable Diffusion 3.5 Large, Large Turbo, Medium, and Flash, Stable Image Core and Ultra, SDXL, and image upscaling services. Developers can call the models through the Stability AI API, while model licenses and commercial-use conditions depend on the model and the organization’s revenue or deployment context. API usage is credit-based, with 1 credit listed as $0.01 and 25 introductory credits, with the getting-started guide specifically confirming the grant for Google social sign-in. This is a finite starter allowance.

✨ Key Features

• Text-to-image — Generate images from natural-language prompts.
• Prompt adherence — Use newer models designed to follow detailed prompts.
• Image editing — Edit or transform an existing image with supported services.
• Image upscaling — Enlarge images with fast, conservative, or creative upscalers.
• Multiple model sizes — Choose quality, speed, and cost across the SD 3.5 family.
• SDXL access — Use the established SDXL model through supported APIs.
• API integration — Add generation to applications with Stability’s endpoints.
• Developer controls — Set aspect ratio, output format, and other request parameters.
• Self-hosted/open models — Use available model weights under applicable licenses.
• Commercial licensing — Review the applicable Community or Enterprise terms before commercial deployment.

💳 Pricing

• Self-hosted weights — Eligible Core Models can be used under the current Community License. Commercial eligibility depends on model terms and organization revenue; infrastructure and hardware cost extra.
• Enterprise licensing — Commercial users above the license's $1M annual-revenue threshold should obtain the applicable Enterprise terms. Research-only use has separate eligibility described in the linked license.
• API — 1 credit equals $0.01. The 25 introductory credits are finite, not recurring free API access; the getting-started guide confirms Google social sign-in eligibility.
• SD 3.5 API rates — Large 6.5 credits, Large Turbo 4, Medium 3.5, Flash 2.5 per successful generation; failed generations are not charged.
• Upscaling — Supported API upscalers range from 2 to 60 credits depending on the service.

⚖️ Alternatives Compared

🎯 Use Cases

• Product imagery: Generate or enhance visual assets.
• Concept art: Explore visual directions from prompts.
• Marketing graphics: Produce campaign and web imagery.
• Image editing: Transform existing images through API services.
• Upscaling: Prepare low-resolution content for larger output.
• Prototype apps: Add image generation to an application.
• Private deployment: Run eligible model weights in controlled infrastructure.
• Model experimentation: Compare speed, quality, and cost across variants.