model-compatibility

# ComfyUI Model Compatibility Matrix ## Stable Diffusion 1.5 (SD 1.5) ### Overview The original widely-adopted Stable Diffusion model. Huge ecosystem of fine-tunes, LoRAs, ControlNets, and embeddings. Still the most compatible and lightweight model family. ### Configuration | Parameter | Value | |-----------|-------| | **Loader** | `CheckpointLoaderSimple` | | **Native Resolution** | 512x512 | | **Supported Resolutions** | 512x512, 512x768, 768x512, 768x768 (some fine-tunes) | | **VAE** | Built-in or external (`vae-ft-mse-840000-ema-pruned.safetensors`) | | **CLIP** | Single CLIP-L (output index 1 from checkpoint) | | **Text Encoder Node** | `CLIPTextEncode` | | **CFG Range** | 7-12 (typical: 7.5) | | **Negative Prompt** | Yes — very important for quality | | **Steps** | 20-30 (standard samplers) | | **Sampler** | All standard samplers: `euler`, `euler_ancestral`, `dpmpp_2m`, `dpmpp_sde`, `ddim` | | **Scheduler** | `normal`, `karras` | | **Denoise** | 1.0 (txt2img), 0.5-0.8 (img2img) | | **VRAM (FP16)** | ~2-3GB | ### Workflow Pattern ``` CheckpointLoaderSimple → MODEL(0), CLIP(1), VAE(2) CLIP(1) → CLIPTextEncode (positive) → CONDITIONING CLIP(1) → CLIPTextEncode (negative) → CONDITIONING EmptyLatentImage (width=512, height=512) → LATENT KSampler (cfg=7.5, steps=20, sampler="euler", scheduler="normal") → LATENT VAEDecode → IMAGE SaveImage ``` ### VAE Notes - Most SD 1.5 checkpoints have a built-in VAE, but it's often mediocre - **Recommended**: Use external `vae-...