Stability AI 25 Free API Credits
25 free Stability AI API credits for image, audio, and 3D testing
What you get from Stability AI 25 Free API Credits for free
Overview
Stability AI's developer platform is the REST API for the Stable Image and Stable Diffusion 3.5 image models, image editing and upscaling endpoints, Stable Audio, and Stable Fast 3D. New accounts receive 25 free credits for initial testing and evaluation purposes (stated in the platform's Getting Started flow), so you can call the API before adding billing.
Free Tier Quotas & Limits
API usage is credit-based. Current per-request credit prices on the platform:
- Image generation: Stable Image Ultra 8, Stable Diffusion 3.5 Large 6.5, SD 3.5 Large Turbo 4, SD 3.5 Medium 3.5, Stable Image Core 3, SDXL 1.0 from 0.9
- Editing: Erase 5, Inpaint 5, Outpaint 4, Remove Background 5, Search and Recolor 5, Search and Replace 5, Replace Background & Relight 8, Structure 5, Sketch 5, Style Guide 5, Style Transfer 8
- Upscaling: Fast 2, Conservative 40, Creative 60
- Audio: Stable Audio 3.0 8 credits (up to 6 minutes), Stable Audio 2.5 8 credits (up to 3 minutes)
- 3D: Stable Fast 3D 10, Stable Point Aware 3D 4
The 25-credit grant is a one-time allocation for new accounts. Credit pricing is published at docs.stability.ai/pricing.
How to Get Started
- Create an account at platform.stability.ai.
- Open the account's API Keys section; a key is created on signup, and up to 10 keys can be managed.
- Send requests to the v2beta REST endpoints with
Authorization: Bearer sk-....
The platform also exposes image editing (erase, inpaint, outpaint, search-and-replace), upscaling, and 3D generation endpoints, all spendable from the same credit balance.
Before you claim
- Payment card: Not needed.
- Account: Sign up with the provider.
Key limits
- 25 free credits, granted on Google social-login signup
- One-time grant for initial testing and evaluation
Eligibility
Outputs can be used commercially under Stability AI's Community License for organisations with annual revenue below US$1M; larger organisations require an Enterprise License.
ComfyUI (GPL-3.0) runs on your own machine with no quota. Needs: 4 GB VRAM + 8 GB RAM (CPU-only also possible).
Runs Stability's open models locally.
Models served free
Limits as the provider publishes them; a dash means none is published.
| Model | Context | RPM | RPD | TPM | Tools | Vision |
|---|---|---|---|---|---|---|
| Stable Image Ultra8 credits per result; API-wide limit of 150 requests per 10 seconds | — | — | — | — | — | — |
| Stable Image Core3 credits per generation; same API-wide limit | — | — | — | — | — | — |
History
Verified by a person on · last automated check : no change found. Automated findings never change this page until a person confirms them (how we verify).
- Terms updatedby a person · Content updated from https://docs.stability.ai/pricing (checked 2026-10-21).
- Verifiedby a person
- Listedby a person
Full history with screenshots · How we verified this offer · Sitewide changelog
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