--- license: cc-by-nc-4.0 language: - en pipeline_tag: text-to-image base_model: Tongyi-MAI/Z-Image tags: - gguf - safetensors - text-to-image - rundiffusion - z-image - fast - turbo - 4-step ---

Juggernaut Z Fast by RunDiffusion

The fast 4-step Juggernaut Z release for cheaper, faster image generation.

> **Juggernaut Z Fast** is the speed-focused release of Juggernaut Z. It keeps the cinematic, polished Juggernaut look while targeting **4-step generation** for lower latency and lower compute cost. Think of it as the Fast/Turbo-style companion to the full Juggernaut Z release. This repository hosts the official RunDiffusion Fast release artifacts: Fast safetensors variants and GGUF quantizations. The Diffusers export will be added at the repository root when available. --- ## Why Fast - **4-step generation** for quick iteration and lower cost - Strong Juggernaut Z visual identity with cinematic lighting and polished composition - Better fit for high-volume workflows where the full model's 25-45 step range is too slow - Useful for previewing, concept passes, product mockups, social content, and fast prompt exploration - Available in full Fast weights, FP16, FP8, and GGUF quantized variants ## Recommended Settings | Parameter | Recommendation | | --- | --- | | Steps | `4` | | Workflow | Use a Fast/Turbo-compatible Z-Image workflow | | CFG | Start with the workflow default; avoid full-model high-step settings | | Use case | Fast previews, lower-cost production passes, text-layout checks, product and portrait exploration | The full Juggernaut Z model is still the better choice when you want slower high-step refinement. Use this Fast release when speed and cost matter. ## Files In This Repo | File | Format | Notes | | --- | --- | --- | | `JuggernautZ_Fast_by_RunDiffusion.safetensors` | safetensors | Original Fast release weights | | `Juggernaut_Z_V1_Fast_FP16.safetensors` | safetensors fp16 | Half-precision Fast weights | | `Juggernaut_Z_V1_Fast_FP8_e4m3fn.safetensors` | safetensors fp8 e4m3fn | Lower VRAM footprint | | `Juggernaut_Z_V1_Fast_by_RunDiffusion_q8_0.gguf` | GGUF q8_0 | Highest-quality quant | | `Juggernaut_Z_V1_Fast_by_RunDiffusion_q6_k.gguf` | GGUF q6_k | Balanced quality and size | | `Juggernaut_Z_V1_Fast_by_RunDiffusion_q5_k_m.gguf` | GGUF q5_k_m | Medium quant | | `Juggernaut_Z_V1_Fast_by_RunDiffusion_q5_k_s.gguf` | GGUF q5_k_s | Smaller q5 quant | | `Juggernaut_Z_V1_Fast_by_RunDiffusion_q4_k_m.gguf` | GGUF q4_k_m | Compact quant | | `Juggernaut_Z_V1_Fast_by_RunDiffusion_q4_k_s.gguf` | GGUF q4_k_s | Smallest footprint | ## Example Gallery The examples below are pulled from the RunDiffusion asset library for the `juggernaut z fast` release collection and organized by the categories used during curation. Click any example image to open the larger CDN version. | Category | Count | | --- | ---: | | People | 30 | | Text generation | 12 | | Art & concept | 17 | | Architecture & interiors | 10 | | Product & branding | 9 | | Nature & travel | 4 | | Food & beverage | 3 | ## People Editorial portraits, fashion, lifestyle, sports, and cinematic character studies. | | | | | --- | --- | --- | |

_{05 - Playful Beauty Makeup Portrait} |

_{08 - Floral Dress Park Portrait} |

_{18 - Boxer Athlete Portrait} | |

_{22 - Neon Streetwear Alley Portrait} |

_{24 - Red Gown Fern Garden Fashion} |

_{26 - Gold Editorial Lounge Fashion} | |

_{27 - Soft Window Light Portrait} |

_{28 - Black And White Menswear Portrait} |

_{29 - Glamour Undercut Beauty Portrait} | |

_{30 - Moody Male Close Up} |

_{31 - Neon Runner Activewear} |

_{33 - White Lace Beauty Close Up} | |

_{35 - Tactical Black Outfit Portrait} |

_{36 - Friendly Laptop Workspace Portrait} |

_{37 - Bohemian Desert Fashion Portrait} | |

_{38 - Businessman Running Neon City} |

_{39 - Library Suit Portrait} |

_{40 - Soft Transit Window Portrait} | |

_{41 - White Sunglasses Fashion Close Up} |

_{42 - Neon Hallway Curly Hair Portrait} |

_{43 - Quiet Kitchen Texting Portrait} | |

_{45 - Color Gel Beauty Portrait} |

_{47 - Green Light Young Man Portrait} |

_{48 - Neon Crowd Phone Portrait} | |

_{51 - Yellow Metro Fashion Portrait} |

_{60 - Grocery Clerk Portrait} |

_{61 - Redhead Cafe Portrait} | |

_{63 - Black And White Fashion Villain Portrait} |

_{76 - Armored Bearded Warrior Portrait} |

Juggernaut Z Fast 79 - Tea House Red Dress Portrait

_{79 - Tea House Red Dress Portrait} | ## Text Generation Readable typography examples: signs, headlines, apparel text, chalkboards, captions, and brand copy. | | | | | --- | --- | --- | |

_{65 - Typewriter Juggernaut Text} |

_{66 - Midnight Diner Neon Sign} |

_{67 - Rebel Without A Cause Jacket Text} | |

_{68 - Aeterna Est Stone Inscription} |

_{69 - Future Is Now Newspaper} |

_{70 - Unsolved Chalkboard Question} | |

_{71 - California Surf Club T Shirt} |

_{72 - Danger Zone Road Sign} |

_{74 - Revolution Graffiti Wall} | |

_{75 - Astronaut Going Home Caption} |

_{77 - RunDiffusion Monitor Ad Copy} |

Juggernaut Z Fast 85 - Readable Chalkboard Paragraph

_{85 - Readable Chalkboard Paragraph} | ## Art & Concept Fantasy, sci-fi, surreal scenes, illustration tests, creature design, and concept-art style outputs. | | | | | --- | --- | --- | |

_{01 - Rain-Soaked Cinematic Warrior Portrait} |

_{07 - Neon Futuristic Building} |

_{09 - Ocean Double Exposure Portrait} | |

_{16 - Fashion Sketch Evening Gown} |

_{20 - Armored Fantasy Battle Warrior} |

_{21 - Classical Roman Emperor Portrait} | |

_{53 - Floral Green Statue Portrait} |

_{57 - Robot Scarecrow With Birds} |

_{58 - Dark Floral Creature Mask} | |

_{64 - Sketch To Portrait Comparison} |

_{73 - Zombie Street Character} |

_{78 - Cyborg Face Close Up} | |

_{80 - Cybernetic Villain Pointing} |

_{81 - Cat Chase Market Scene} |

_{82 - Ballerina On Asteroid} | |

_{83 - Teddy Bear Ghost Encounter} |

Juggernaut Z Fast 84 - Skull Flowers Pocket Watch

_{84 - Skull Flowers Pocket Watch} | | ## Architecture & Interiors Modern homes, interiors, classical facades, brutalist structures, and cinematic building studies. | | | | | --- | --- | --- | |

_{02 - Cliffside Glass Ocean House} |

_{03 - Brutalist Concrete Tower} |

_{04 - Sunlit Minimal Interior Lounge} | |

_{06 - Classical White Facade} |

_{10 - Japanese Courtyard Interior} |

_{11 - Cathedral Light Interior} | |

_{14 - Desert Modern White House} |

_{17 - Luxury High Rise Interior} |

_{19 - Angular Metal Museum Exterior} | |

Juggernaut Z Fast 23 - Indoor Jungle Lounge

_{23 - Indoor Jungle Lounge} | | | ## Product & Branding Product mockups and brand/logo tests showing how Fast handles commercial-style compositions and text-bearing objects. | | | | | --- | --- | --- | |

_{44 - RunDiffusion Watch Product Shot} |

_{46 - RunDiffusion Sneaker Ad} |

_{49 - RunDiffusion Skincare Jar} | |

_{50 - RunDiffusion Smartphone Display} |

_{52 - RunDiffusion Whiskey Bottle} |

_{54 - RunDiffusion Coffee Bag} | |

_{56 - RunDiffusion Headphones Product Shot} |

_{59 - RunDiffusion Burger Wrapper} |

Juggernaut Z Fast 62 - RunDiffusion Sunglasses Beach Product

_{62 - RunDiffusion Sunglasses Beach Product} | ## Nature & Travel Landscape, travel, outdoor, and environmental examples. | | | | | --- | --- | --- | |

_{13 - Rainforest Dog Portrait} |

_{25 - Sunset Field Silhouette} |

_{32 - Coastal Cliffs Landscape} | |

Juggernaut Z Fast 55 - Blue Scarf Flower Field Fashion

_{55 - Blue Scarf Flower Field Fashion} | | | ## Food & Beverage Food, drinks, cafe, cocktail, and still-life examples. | | | | | --- | --- | --- | |

_{12 - Butterflies Over Morning Coffee} |

_{15 - Cocktail Ice Splash} |

Juggernaut Z Fast 34 - Berry Pancake Stack

_{34 - Berry Pancake Stack} | ## Diffusers A Fast Diffusers export is planned. When added, it will use the same root-level component layout as `RunDiffusion/Juggernaut-Z-Image`: ```text model_index.json transformer/ text_encoder/ tokenizer/ vae/ scheduler/ ``` Until then, use the standalone Fast `.safetensors` variants with the workflow that matches your local inference stack, or use the `.gguf` variants with a GGUF-compatible runtime. ## Links - **Run Juggernaut Z on RunDiffusion** -> [rundiffusion.com/juggernaut-z](https://www.rundiffusion.com/juggernaut-z?utm_source=huggingface&utm_medium=model_card&utm_campaign=juggernaut_z_fast&utm_content=footer_run) - **Full Juggernaut Z release** -> [RunDiffusion/Juggernaut-Z-Image](https://huggingface.co/RunDiffusion/Juggernaut-Z-Image) - **Base model** -> [Tongyi-MAI/Z-Image](https://huggingface.co/Tongyi-MAI/Z-Image) ## Attribution Juggernaut Z Fast is built on the Z-Image family and released by **Team Juggernaut**, with training by **KandooAI**, published by **RunDiffusion**. ## License & Commercial Use Juggernaut Z Fast is released under **[CC BY-NC 4.0](https://creativecommons.org/licenses/by-nc/4.0/)**: - **BY**: attribute RunDiffusion / Team Juggernaut / KandooAI when sharing output. - **NC**: non-commercial use only. You may not use the model, or its outputs in a workflow, for commercial purposes without a license. You are free to fine-tune, merge, build LoRAs, and otherwise modify the model for non-commercial purposes. **For commercial licensing**, custom models, business inquiries, or consultation, contact **[juggernaut@rundiffusion.com](mailto:juggernaut@rundiffusion.com)**.