Stability AI API
Generate Stable Diffusion images, edits, upscales, 3D, and audio through one API credit price.
Category: Design & Image · Image generation & creative suites
Features
Stability AI API is a commercial pay-as-you-go offer for Stable Diffusion images, editing, upscaling, 3D and audio: one credit equals one cent.
Open-weight models and self-hosting are separate licence and infrastructure decisions. Editing and upscaling can cost more than initial image generation.
- Image generation: SDXL from 0.9 credits ($0.009), Ultra 8 credits ($0.08)
- Editing features: Erase, Inpaint, Remove Background typically 5 credits ($0.05)
- Upscaling: Fast Upscaler 2 credits, Creative Upscaler 60 credits ($0.60)
- Fast 3D 10 credits ($0.10), Stable Audio 2.5 20 credits ($0.20) up to 3 minutes
- Bulk API discounts available on request
- Open-weight models and self-hosting licensed separately from the API
Prices and plans
| Tier | Price | Period | What you get |
|---|---|---|---|
| Free API start | free | One-time | 25 one-time credits Up to 10 SD 3.5 Flash images Or 8 Stable Image Core Or 3 Ultra images API key after account creation |
| Image generate | $0.08 | Usage | SDXL from 0.9 credits = $0.009 SD 3.5 Flash 2.5 = $0.025 Medium 3.5 = $0.035, Turbo 4 = $0.04 Large 6.5 = $0.065 Ultra 8 = $0.08 |
| Upscale / edit | $0.02 / $0.60 | Usage | Fast upscaler 2 credits = $0.02 Erase/inpaint/remove background typically 5 = $0.05 Conservative upscaler 40 = $0.40 Creative upscaler 60 = $0.60 Control/edit price per endpoint |
| Audio / 3D | $0.26 | Usage | Fast 3D 10 credits = $0.10 Stable Audio 2.5 20 = $0.20 up to 3 minutes Stable Audio 3.0 26 = $0.26 up to 6 minutes Audio-to-audio by endpoint |
| Enterprise / self-hosted | contact sales | Contract | Bulk API discounts by quote Open-weight/self-hosted models separate from API Stable Video API discontinued, self-hosted model remains possible Verify licence and infrastructure separately |
Limits
Because one credit is exactly $0.01, $10 buys 1,000 credits: about 125 Ultra, 153 SD 3.5 Large, 250 Turbo, 400 Flash, or 1,111 SDXL images. The 25 free credits correspondingly cover 3/3/6/10/27 outputs. Upscaling is materially costlier than generation: Creative Upscale costs 60 credits, the same as 24 Flash images. Stable Audio 3.0 provides up to six minutes for $0.26. Old Stable Diffusion 3.0 API names reroute to 3.5; Stable Video API and SD 1.6 were discontinued in 2025.
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FAQ
Is Stability AI API available for free?
Not permanently. What is published is a one-off free allowance. 25 one-time credits = e.g. 10 Flash, 8 Core, or 3 Ultra images.
Where is Stability AI API's vendor based?
Stability AI Ltd, based in United Kingdom. For data processing and privacy terms the vendor's own contract governs.
Is Stability AI API still active?
Active Stable Image/audio/3D API; old SD3.0 names rerouted, Stable Video and SD1.6 APIs discontinued.
How many plans are documented for Stability AI API?
The catalog documents 5 plans with price, billing period, and included features.
Which use case is Stability AI API categorized for?
Stability AI API is listed in the catalog under “Design & Image.”
Where do the details about Stability AI API come from?
Prices, limits, and product details are documented against the listed official vendor page.
How we compare
We compare free access, paid entry, plan limits, features and the listed official sources. Unsourced figures stay marked as not published.
Only confirmed entries appear in the catalog. Prices, plans and limits come from listed official vendor pages. Missing figures stay marked as not published. Result lists are alphabetical by default and can be switched to Free access first; neither is a quality ranking. The vendor page always wins.
Edited and checked by the AI Compare team
Sources
- https://platform.stability.ai/pricing
- https://platform.stability.ai/docs
- https://stability.ai/api-pricing-update-25
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