stable-diffusion-v1-5
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The full NVFP4 build of the LTX-2.5 22B distilled transformer, stamped so ComfyUI actually loads it. Smallest working 22B on the board — **18.7GB, ~2.8GB lighter than the official comfy-int8** — and the same-seed output holds up frame for frame. Top row: text-to-video. Bottom row: **image-to-video** from a single keyframe — same start image, same seed, both quants. Native synced audio on all four (yes, the disco clips come with their own disco track). Lightricks ships an NVFP4 export of the 2.5 distilled DiT, but it's a raw TensorRT-ModelOpt export. Load it through ComfyUI's UNETLoader and you get:
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**This is an independent NVFP4 quantization of Qwen Image 2.1. The Qwen team created the original model.** The original model and architecture are Qwen's work. I converted the official Comfy-Org/Qwen-Image-2.1 BF16 checkpoint package and packaged the quantized weights, workflows, and validation here. This is not a new base model or an official Qwen release. I converted Qwen Image 2.1's image transformer and Qwen3-VL 8B language encoder directly from the official BF16 weights into native ComfyUI NVFP4. The vision tower, embeddings, output head, critical image-model tensors, and VAE stay BF16. Real Blackwell FP4 kernels in both denoising and text conditioning, with an included small runtime patch for the latter. No new nodes. **RTX 5090: 6.746 s median for a complete 1024×1024, 40-step run** versus 15.629 s with BF16 and 7.553 s with official INT8. Three warm runs per variant, every node executed, including text encoding. This one-prompt benchmark used the encoder patch; full method and limits.
Native ComfyUI weights, a selectively quantized image transformer and encoder, and seven ready-to-load workflows. Fashion, casual photography, editing, multiple references, typography, illustration, and transparent PNGs. **No custom nodes or core patches required.** All seven workflows were tested on unmodified ComfyUI 0.39.0 with custom nodes disabled. Update ComfyUI and its normal dependencies, then place these files in the matching folders: **15.70 GB total — 51.6% smaller than the original BF16 package.** These are file sizes. Model checksums are included.
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