Stability AI API
Generate Stable Diffusion images, edits, upscales, 3D, and audio through one API credit price.
At a Glance
Stability AI API is an AI tool for Image generation & creative suites (category: Design & Image). Free access: One-off free allowance. Paid from $0.08 (Image generate). Documented: 5 plans with prices and limits.
- Category
- Image generation & creative suites
- Paid from
- $0.08 / Usage (Image generate)
- Free Option
- One-off free allowance
- Plans
- 5
- Sources
- 3 verified sources
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 |
Prices per vendor, excl. taxes/VAT where applicable.
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 the vendor of Stability AI API based?
Stability AI Ltd is based in the United Kingdom. Regardless of that location, data processing and privacy terms are governed by the vendor's own contract.
How is Stability AI API billed?
100 credits cost $1, so one credit equals $0.01. Every successful model or editing request has a fixed credit price; failed generations are not charged. Stability AI bills exclusively in USD credits; there is no currency switch.
How much does Stability AI API cost?
The cheapest paid plan of Stability AI API is Image generate at $0.08. 5 plans are documented in total, each with its price and limits.
Is Stability AI API currently available?
Stability AI API is still active: Stable Image/audio/3D API. Old SD3.0 names have been rerouted, and the Stable Video and SD1.6 APIs have been discontinued.
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. Search results are ordered by Task match by default; category and task lists are alphabetical. Both can be switched to Free access first; neither is a quality ranking. The vendor page always wins.
Edited and checked by the AI Compare Ninja team
Sources
All details regarding plans, limits, and features are based on official vendor documentation and the primary sources verified below.
- https://platform.stability.ai/pricing
- https://platform.stability.ai/docs
- https://stability.ai/api-pricing-update-25
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