Stability AI is the leading provider of open-source image generation models. The Community License allowing free commercial use under $1M revenue is generous, and the massive community has created an unmatched ecosystem of custom models and tools. The API offers credit-based pricing starting at $0.01. Multi-modal capabilities across image, video, and audio are impressive. Steep learning curve for optimal results. Default output quality is inconsistent without expertise.
Stability AI develops open-source generative AI models including Stable Diffusion. Their platform spans text-to-image, video, and audio creation, available via API and self-hosted.