Civitai is a community marketplace and repository for open-source generative-art resources, focusing on Stable Diffusion and Flux models. It hosts thousands of user-contributed models, textual inversions, embeddings, LoRAs, checkpoints and related assets, plus ratings, comments and example images to help creators discover high-quality resources. The platform supports metadata linking (including SHA256 hashes) for reproducibility, provides API access and API keys for programmatic downloads, and integrates with community tools and extensions (for example Automatic1111 extensions and the Civitai Link websocket) to streamline installing and using models in local Stable Diffusion instances. Civitai’s value comes from centralizing model discovery, community validation, and tooling integrations to accelerate model reuse and reproducible generative workflows.