FLUX.2 [klein] 4B

by Black Forest Labs January 15, 2026

FLUX.2 [klein] 4B is a 4-step distilled image generation and editing model optimized for ultra-low latency inference. It delivers near real-time performance with strong visual quality, enabling interactive workflows and responsive production systems on more constrained hardware.

Text to Image

Bioluminescent Desert Bazaar Twilight

Request

{
  "taskType": "imageInference",
  "taskUUID": "a04b1e78-e91c-4f50-b5aa-5aaf45787d54",
  "model": "runware:400@4",
  "positivePrompt": "A cinematic twilight bazaar in a vast desert of pale violet dunes, glowing bioluminescent lanterns hanging from silk canopies, mirrored pools reflecting a giant crescent moon, merchants in ornate nomadic attire, glass vessels filled with luminous spices, gentle wind lifting embroidered fabrics, a towering fossilized skeleton arch in the background, teal and amber color palette, atmospheric haze, crisp foreground detail, immersive depth, elegant composition, highly detailed, surreal realism",
  "negativePrompt": "blurry, low detail, flat lighting, oversaturated, distorted anatomy, duplicated people, extra limbs, warped architecture, text, watermark, logo, frame, cropped subject, noisy shadows",
  "width": 1024,
  "height": 576,
  "seed": 53982,
  "steps": 4,
  "CFGScale": 3.5
}

Response

{
  "taskType": "imageInference",
  "taskUUID": "a04b1e78-e91c-4f50-b5aa-5aaf45787d54",
  "imageUUID": "602ff884-6f08-457d-b616-5d1143491e92",
  "imageURL": "https://im.runware.ai/image/os/a20d05/ws/2/ii/602ff884-6f08-457d-b616-5d1143491e92.jpg",
  "seed": 53982,
  "cost": 0.0006
}