---

name: flux-2-klein-4b-base-text-to-image description: "Flux 2 | Klein | 4B | Base | Text to Image. Generate images from text with a fast lightweight 4B model. Triggers: text to image, fast image generation, flux generate, ai art" allowed-tools: Bash(curl *), WebFetch

Flux 2 | Klein | 4B | Base | Text to Image

Generate images from text prompts using the lightweight Flux 2 Klein 4B Base model. Optimized for speed with only 4 inference steps by default, making it ideal for rapid prototyping and iteration.

Quick Start

Requires an each::labs API key. Get one at eachlabs.ai.

curl -X POST https://api.eachlabs.ai/v1/prediction \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -d '{
    "model": "flux-2-klein-4b-base-text-to-image",
    "version": "0.0.1",
    "input": {
      "prompt": "A cozy coffee shop interior with warm lighting and bookshelves",
      "image_size": "landscape_4_3",
      "num_inference_steps": 4,
      "output_format": "png"
    }
  }'

Parameters

Parameter	Type	Default	Description
enable_safety_checker	boolean	true	If set to true, the safety checker will be enabled.
image_size	string	landscape_4_3	The size of the image to generate. Options: square_hd, square, portrait_4_3, portrait_16_9, landscape_4_3, landscape_16_9
num_images	integer	1	The number of images to generate.
num_inference_steps	integer	4	The number of inference steps to perform.
output_format	string	png	The format of the generated image. Options: jpeg, png, webp
prompt	string	-	The prompt to generate an image from.
seed	integer	-	The seed to use for the generation. If not provided, a random seed will be used.

Examples

Quick generation:

curl -X POST https://api.eachlabs.ai/v1/prediction \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -d '{
    "model": "flux-2-klein-4b-base-text-to-image",
    "version": "0.0.1",
    "input": {
      "prompt": "Abstract geometric patterns in blue and gold, digital art"
    }
  }'

Square HD with reproducible seed:

curl -X POST https://api.eachlabs.ai/v1/prediction \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -d '{
    "model": "flux-2-klein-4b-base-text-to-image",
    "version": "0.0.1",
    "input": {
      "prompt": "Photorealistic macro shot of a dewdrop on a leaf",
      "image_size": "square_hd",
      "num_inference_steps": 6,
      "output_format": "webp",
      "seed": 42
    }
  }'

Related Models

• Flux 2 | Klein | 4B | Base | Edit - Edit images with the same 4B model
• Flux 2 | Klein | 9B | Base | Text to Image - Higher quality 9B variant
• Flux 2 | Klein | 4B | Text to Image - Enhanced 4B variant with guidance and acceleration

Documentation

• each::labs Docs
• API Reference