Stability AI's decision to open-source Stable Diffusion weights was the most consequential event in AI art history — enabling millions of fine-tuned models, custom LoRAs, and commercial applications that the closed API model of Midjourney or DALL-E could never support. For developers building AI image features, the open weights provide both capability and cost advantages over API-only competitors.

Stability AI created Stable Diffusion — the world's most widely used open-source AI image generation model — and released it for anyone to run locally or via API. With Stable Diffusion 3.5 and SDXL, the models offer photorealistic quality, fine-grained control, and the ability to run on consumer GPU…

Stability AI API AI Image Generator
Stability AI API lets developers generate images via REST API without managing local GPU hardware.
$0.065–$0.09 per image (
Prijs
SD3.5 Large, SDXL, Core,
AI Models
Yes — multiple tiers
Image Quality
Stable Diffusion 3.5 (Local) AI Image Generator
Stable Diffusion 3.5 Large can run locally on GPUs with 8+ GB VRAM — unlimited generation at no API cost.
Free (open weights)
Prijs
Local GPU or cloud
Deployment
8 GB (SDXL), 24 GB (SD3.
Minimum Vram