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FLUX.1 [dev] Text-To-Image 12B Rectified-Flow Ultra-Fast Model

wavespeed-ai/flux-dev-ultra-fast

FLUX.1 [dev] is a 12B rectified-flow transformer for high-quality text-to-image generation, optimized for ultra-fast inference. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

Input

Hint: You can drag and drop a file or click to upload

Hint: You can drag and drop a file or click to upload

width
height
1024 × 1024 px
Range: 256 - 1536
If enabled, the output will be encoded into a BASE64 string instead of a URL. This property is only available through the API.
If set to true, the function will wait for the result to be generated and uploaded before returning the response. It allows you to get the result directly in the response. This property is only available through the API.

Idle

A young, attractive Indian couple standing side by side at their traditional wedding ceremony, both facing the camera with warm smiles. The bride wears a red and gold lehenga with intricate embroidery, heavy jewelry, and a maang tikka; the groom in an ivory sherwani with a red stole and turban. Background: lavish wedding decor with marigold flowers and fairy lights. Rich colors, sharp focus, photorealistic, cinematic lighting, full-body portrait, authentic Indian wedding atmosphere.

您的请求将花费 $0.005 每次运行。

使用 $1 您可以运行此模型大约 200 次。

还有一件事：

示例查看全部

A young, attractive Indian couple standing side by side at their traditional wedding ceremony, both facing the camera with warm smiles. The bride wears a red and gold lehenga with intricate embroidery, heavy jewelry, and a maang tikka; the groom in an ivory sherwani with a red stole and turban. Background: lavish wedding decor with marigold flowers and fairy lights. Rich colors, sharp focus, photorealistic, cinematic lighting, full-body portrait, authentic Indian wedding atmosphere.
Mudcat and Redshank in Santiago, Chile in the style of art nouveau
a 21 years old girl is riding bicycle at European mountain area, blond, nice smile, a lake next to the riding road, flowers at the road side
3D clay-like texture coffee machine is making coffee, handcrafted appearance, a clay-like milk box is next to the coffee machine
Collage art with mixed media, layered textures, and vibrant colors. A lively medieval caravan campsite unfolds at a crossroads, featuring canvas tents nestled on the edge of a lush forest, glowing lanterns illuminating the scene, and a circle of covered wagons. In the foreground, a small, impish male kender alchemist stands, exuding curiosity and playfulness. His fair skin contrasts sharply with his short, tousled hair, emphasizing his youthful demeanor. He wears protective goggles, surrounded by an array of bubbling vials and concoctions, embodying his adventurous spirit. The lively environment suggests a fantasy theme, filled with eclectic, playful designs that draw the viewer in. The background captures a dynamic arrangement of tents and wagons, while the foreground showcases the kender's focused pose, contemplating his latest experiment. The color scheme is rich and vibrant, with bright highlights from the lanterns and dark shadows resembling the forest backdrop. The lighting is warm and inviting, creating a whimsical atmosphere, and the textures range from the smooth surface of the glass vials to the roughness of the canvas tents.
Bande dessine, franco-belgian comics, french comic book style, ligne claire, clear line, comic book art, comic book style, comic book illustration, comic book drawing, comic book art style, vibrant, detailed, action-packed, dynamic, comic book aesthetic, A stylized French comic book illustration featuring a rugged sailor who is also a seasoned fighter. He wears a tattered naval coat over leather armor, a sabre at his hip, and a harpoon slung across his back. His weathered face is shadowed under a wide-brimmed hat, eyes reflecting the glow of a dying, dark red sun hanging low in the sky. The setting is a surreal shoreline with black sand and jagged coral spires rising from crimson waters. In the background, a massive, twisted shipwreck looms like a skeletal beast. Use moody colors, bold ink lines, and expressive poses typical of bandes dessinées. Dynamic composition, mysterious atmosphere, windswept and grim.
Butcherbird and Guinea in Canberra, Australia in the style of byzantine
A stunning girl in Norway?s mountains, taking in the aurora borealis in a realistic style. IMG_1018.CR2
Bande dessine, franco-belgian comics, french comic book style, ligne claire, clear line, comic book art style. In a desolate wasteland under a bright, white sun, a fierce female goliath stands on the deck of a ship, battling tumultuous waves. Her muscular stone-grey skin and bold tattoos are prominently displayed as she wears a tight-fitting tank top and short sailor pants. A long scimitar hangs at her side, ready for action. The goliath, around 30 years old, is bald with a broad nose, exuding confidence as she maneuvers with ropes and sails. The background features cracked earth, skeletal remains, and muted sandy browns and yellows, creating a stark atmosphere. Textures appear rough and gritty, echoing the oppressive environment. The overall theme conveys a sense of struggle and resilience amidst the harsh reality of adventure.
A homeless person wearing worn-out clothes and a beanie is pushing a shopping cart overflowing with groceries, plastic bags, and random belongings right in the center of a busy city road. The cart is blocking multiple lanes, causing a traffic jam. Frustrated drivers are honking, and cars are stuck in both directions. Some drivers are leaning out of their windows in confusion or anger. The city skyline is visible in the background, and it’s late afternoon with a cloudy sky.
(acrylic painting:1.5), Acrylic painting on canvas, vibrant colors, textured brushstrokes, impasto technique, layered colors, dynamic composition, bold strokes, rich pigments, expressive brushwork, varied textures, modern art influences, high contrast,, Goliath with short hair, muted purple skin, Black Tree root tattoo wrapping around his arms and legs
Bande dessine, franco-belgian comics, in a vibrant, detailed comic book art style. A muscular female goliath with stone-grey skin, bald and around 30 years old, stands confidently on the deck of a ship. She wears a tight-fitting tank top and short sailor pants, embodying a rugged, dynamic fighter. Cracked earth and skeletal remains stretch across a desolate wasteland in the background, underscoring a harsh, oppressive atmosphere, with a bright white sky beating down under the Dark Sun. The colors are desaturated, featuring sandy browns and muted yellows. The goliath battles the waves, skillfully maneuvering ropes and sails, with a determined expression that hints at a lifetime of hardship and adventure. Textures are rough and gritty, conveying the raw nature of the environment. The scene exemplifies a thrilling fantasy theme, where the struggle between the sailor and the elements unfolds, perfectly framing the goliath's powerful stance amidst the expansive, barren landscape.
A romantic movie poster set in Paris at sunset — a couple sharing a quiet, intimate moment on a rooftop, city lights beginning to glow, Eiffel Tower in the background. Soft warm tones, dreamy lighting, subtle bokeh effect. The woman wears a flowing red dress, the man in a classic black suit. Title in elegant serif font at the top, tagline below in cursive.

README

FLUX Dev Ultra Fast — wavespeed-ai/flux-dev-ultra-fast

FLUX Dev Ultra Fast is a lightweight, high-speed image generation and editing model built for rapid iteration. It supports both text-to-image generation and image-guided editing (image-to-image), with optional mask-based localized edits for targeted changes. This model is ideal when you need quick creative exploration, bulk variants, or fast prompt testing while maintaining strong visual quality.

Key capabilities

  • Text-to-image generation for fast concepting
  • Image-to-image editing for guided variations
  • Masked editing (inpainting-style) for localized changes
  • Adjustable strength to control how closely results follow the input image
  • Custom output size, seed control, and standard image formats
  • Efficient for high-volume runs and rapid experimentation

Use cases

  • Rapid creative iterations for ads, thumbnails, and social content
  • Style and composition exploration with quick turnaround
  • Background swaps and wardrobe edits using a mask
  • Product mockups and marketing variations (colorways, materials, packaging)
  • Portrait enhancement workflows where speed matters (non-destructive variations)

Pricing

OutputPrice
Per image$0.005

Inputs

  • prompt (required): what to generate or how to edit
  • image (optional): source image for image-to-image guidance
  • mask_image (optional): region mask for localized edits

Parameters

  • strength: how strongly the output is allowed to deviate from the input image (only for image-to-image)
  • width / height: output size (e.g., 1024×1024)
  • num_inference_steps: sampling steps
  • guidance_scale: prompt adherence strength
  • num_images: number of images to generate per run
  • seed: random seed (-1 for random; set for reproducible results)
  • output_format: jpeg / png / webp, etc.
  • enable_base64_output: return BASE64 instead of URL (API only)
  • enable_sync_mode: wait for upload and return directly (API only)

Prompting tips

  • For photoreal shots, specify lens/lighting and keep subject details explicit.
  • For edits, describe the change clearly and rely on the input image to preserve identity and layout.
  • If using a mask, focus the prompt on what should change inside the masked region.

Example prompts

  • A young couple standing side by side at a traditional wedding ceremony, warm smiles, intricate embroidered attire, realistic lighting, shallow depth of field, ultra-detailed, natural skin texture.
  • Edit: keep the same pose and background, change the clothing to a modern black suit and white dress, clean studio lighting, photorealistic.