What is Stability AI and what is it used for?
Stability AI is a generative media AI company, known for the Stable Diffusion image model family and the Stable Audio audio models, which it offers through an API and as weights you can download.
Through its developer platform, the company provides image, audio and 3D model services. The image services include generation with Stable Image Ultra, which the documentation says is based on Stable Diffusion 3.5 Large, and Stable Image Core, plus image editing and upscaling.
The models also arrive through other routes. The Stable Diffusion 3.5 weights are on Hugging Face under the Stability AI Community License, and three of the Stable Audio models have open weights. The largest audio model in the family is outside the open weights: it is on the API and under an Enterprise license for self-hosting.
Stability AI therefore serves teams that need to generate or edit images and audio from code, or run those models on their own infrastructure. The hosted Stable Video Diffusion API was discontinued in July 2025, according to the company.






