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Black Forest Labs · Image

FLUX.2 [klein] 4B API pricing

bfl/flux-2-klein-4b

Fastest, lowest-cost FLUX.2 text-to-image. FLUX.2 [klein] 4B by Black Forest Labs, routed through INFRO on a Black Forest Labs account you connect — alongside every other provider you run. Black Forest Labs bills you for it directly, on that account and at your own rate. INFRO adds routing, failover, request logs, cost attribution and policy around it, and takes no part of what you pay Black Forest Labs.

Pricing

Per imageUSD · updated 2026-10-05

Black Forest Labs rate

$0.014

per image, billed to you by Black Forest Labs

INFRO adds

$0

0% markup on model spend

Calling FLUX.2 [klein] 4B

POST /v1/images/generations
import os
from infro import Infro

client = Infro(api_key=os.environ["INFRO_API_KEY"])

image = client.images.generate(
    model="bfl/flux-2-klein-4b",
    prompt="studio product shot, soft rim light",
    n=1,
)

What this modality supports

  • Text to image
  • Editing & inpainting
  • Upscale & restore
  • Batch requests

Text-to-image, editing, upscaling, and background removal across the leading image models. One request shape, consistent sizes and seeds, billed per image with no minimums.

QuickstartGet a key

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Work out what FLUX.2 [klein] 4B would cost you

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