FLUX.2 [klein]

Approved Data Classifications

Description

FLUX.2 [klein] is Black Forest Labs’ fast image generation family for interactive, high-volume visual workflows. The Klein family emphasizes sub-second inference, strong image quality, and efficient deployment, with 4B and 9B variants available for different quality and hardware needs. BFL documents pricing starting at $0.014 per image for Klein 4B and $0.015 per image for Klein 9B, with cost scaling by output resolution.

Capabilities

Model	Release Date	Input	Output	Context Length	Cost (per image)
flux.2-klein	January 15, 2026	Text	Image	n/a	from $0.014/image

info

• Pricing varies by output resolution
• Klein 4B starts at $0.014/image
• Klein 9B starts at $0.015/image
• All prices listed are based on 1 image

Availability

Cloud Provider

Usage

curl

curl -X POST https://api.ai.it.ufl.edu/v1/images/generations \
-H "Content-Type: application/json" \
-H "Authorization: Bearer <API_TOKEN>" \
-d '{
  "model": "flux.2-klein",
  "prompt": "An Alligator walking around the University of Florida saying hi to students.",
  "n": 1,
  "size": "1024x1024",
  "quality": "standard",
  "response_format": "b64_json"
}'

python

from openai import OpenAI

client = OpenAI(
    api_key="your_api_key",
    base_url="https://api.ai.it.ufl.edu/v1"
)

response = client.images.generate(
    model="flux.2-klein",
    prompt="An Alligator walking around the University of Florida saying hi to students.",
    size="1024x1024",
    quality="standard",
    n=1,
    response_format="url"
)

image_url = response.data[0].url

javascript

import OpenAI from 'openai';

const openai = new OpenAI({
  apiKey: 'your_api_key',
  baseURL: 'https://api.ai.it.ufl.edu/v1'
});

const response = await openai.images.generate({
    model: "flux.2-klein",
    prompt: "An Alligator walking around the University of Florida saying hi to students.",
    n: 1,
    size: "1024x1024",
    quality: "standard",
    response_format: "url",
});

const image_url = response.data[0].url;

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References

1. Black Forest Labs - FLUX.2 [klein]
   https://bfl.ai/models/flux-2-klein
2. Black Forest Labs Pricing
   https://docs.bfl.ml/quick_start/pricing