ComfyUI
A node graph for image and video models. Steeper to learn than anything else here, and the only one that lets you build exactly the pipeline you want.
- Self-hosted
- Allowed
Stable Diffusion 1.5
The old workhorse. Small, fast, endlessly fine-tuned, and still the model most community checkpoints are built on.
- Open weights
- Image
- Allowed adult content
At a glance
- Made by
- Stability AI / RunwayML
- Family
- Stable Diffusion
- Licence
- CreativeML Open RAIL-M
- Graphics memory
- 4 GB minimum, 6 GB recommended
- Adult content
- AllowedAdult content is permitted within the published rules.
Superseded on quality by everything after it, and still the reason a six-year-old graphics card is enough to start. Its size is its advantage: 512×512 output, about 4 GB of VRAM, and a decade of community checkpoints and LoRAs that only exist for this architecture.
The licence is a RAIL licence, not a plain open-source one: it carries use restrictions. Read it before you build a business on it.