black_forest_labs/black-forest-labs-flux-2-klein-4b/Released Jan 2026

FLUX.2 Klein 4B

FLUX.2 Klein 4B is a compact 4 billion parameter text-to-image diffusion model optimized for fast inference and high-quality image generation.

Fine-tunable

Provider

black_forest_labs

Modality

multi-to-image

Released

Jan 2026

Pricing

$0.01 / image

Ready to build with FLUX.2 Klein 4B?

bash

curl -sSf -X POST https://hub.oxen.ai/api/images/edit \
    -H "Content-Type: application/json" \
    -H "Authorization: Bearer $OXEN_API_KEY" \
    -d '{
  "model": "black-forest-labs-flux-2-klein-4b",
  "prompt": "A cat sitting on a chair",
  "aspect_ratio": "1:1",
  "output_quality": "standard",
  "output_format": "png",
  "num_inference_steps": 28,
  "guidance_scale": 2
}'