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FLUX.2 Klein 4B

wavespeed-ai/flux-2-klein-4b/text-to-image

FLUX.2 [klein] 4B is a compact 4-billion-parameter text-to-image model that delivers fast generation with quality results. Ready-to-use REST inference API, best performance, no cold starts, affordable pricing.

Input
width
height
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.
If enabled, the output will be encoded into a BASE64 string instead of a URL. This property is only available through the API.

Idle

ancient monumental Teotihuacán pyramids illuminated by red lights, in the sky a giant Saturn suspended in the sky, sculptural and non-astronomical, with rings of liquid metal, futuristic yet archaic, evoking a sacred portal rather than a planet, little light fog, cinematic depth and atmospheric perspective, minimal composition with large clean negative space for typography

您的请求将花费 $0.008 每次运行。

使用 $1 您可以运行此模型大约 125 次。

还有一件事：:

示例查看全部

ancient monumental Teotihuacán pyramids illuminated by red lights, in the sky a giant Saturn suspended in the sky, sculptural and non-astronomical, with rings of liquid metal, futuristic yet archaic, evoking a sacred portal rather than a planet, little light fog, cinematic depth and atmospheric perspective, minimal composition with large clean negative space for typography
Black and white photo of New York City, skate culture aesthetic, strong focus on tall buildings and urban architecture, low angle perspective, gritty street vibe, raw and authentic mood, high contrast, grainy film photography, underground skate scene feeling, cinematic composition, moody lighting, urban attitude
A man with a sleek, sculpted face, dressed in a matte burgundy velvet suit. A large velvet-textured black panther (wine tint) sitting beside him. Editorial, dramatic, ultra-premium light.
a skeleton surfing while drinking a beer in a cartoonish style, large resolution and high quality, on a black background
A beautiful girl, 29-35 years old, European-looking, kind, spontaneous, smiling, with long, thick, loose chestnut-colored hair (the hair has a slight reddish tint in the sun), riding a horse, in nature, a sandy landscape, the ocean is visible, and the girl and horse are visible in full growth, 85 mm lens, cinematic lighting, skin with pores and microtexture.

README

FLUX.2 Klein 4B Text-to-Image

FLUX.2 Klein 4B Text-to-Image is a lightweight yet capable text-to-image generation model. Describe your vision in text and get quality images with fast generation — the most affordable option in the FLUX.2 Klein family.

Why Choose This?

  • Fast and affordable 4B parameter model optimized for quick turnaround at the lowest cost in the Klein series.

  • Good prompt adherence Accurately interprets prompts to generate images that match your description.

  • Flexible sizing Custom width and height controls for any aspect ratio.

  • Prompt Enhancer Built-in tool to automatically improve your prompts for better results.

  • Best value Ideal for rapid prototyping, batch processing, and budget-conscious projects.

Parameters

ParameterRequiredDescription
promptYesText description of the image you want to generate
widthNoOutput width in pixels (default: 1024)
heightNoOutput height in pixels (default: 1024)
seedNoRandom seed for reproducibility (-1 for random)

How to Use

  1. Write your prompt — describe the image including subject, style, lighting, and mood.
  2. Set size — adjust width and height for your desired dimensions.
  3. Set seed — use -1 for random, or specify a number for reproducibility.
  4. Run — submit and download the generated image.

Pricing

ItemCost
Per image$0.008

Simple flat-rate pricing regardless of image size.

Best Use Cases

  • Rapid Prototyping — Quickly test ideas and concepts at minimal cost.
  • Batch Generation — Lowest cost enables large-scale image production.
  • Creative Exploration — Iterate on prompts without budget concerns.
  • Drafts and Mockups — Generate initial visuals before refining with higher-tier models.
  • Learning and Testing — Experiment with prompting techniques affordably.

Pro Tips

  • Be specific in your prompts — include subject, style, lighting, colors, and atmosphere.
  • Use the same seed to reproduce identical outputs or compare prompt variations.
  • Start with 1024x1024 for balanced quality, adjust dimensions for specific needs.
  • Need higher quality? Try FLUX.2 Klein 9B Text-to-Image.
  • Need custom styles? Try FLUX.2 Klein 4B Text-to-Image LoRA.

Notes

  • Most affordable option in the FLUX.2 Klein series.
  • For best results, write detailed, descriptive prompts.

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