Flux 2 Klein Base 4B Text to Image LoRA | Custom LoRA Image API

FLUX.2 Klein Base 4B Text-to-Image LoRA

FLUX.2 Klein Base 4B Text-to-Image LoRA is a lightweight yet powerful text-to-image generation model with full LoRA support. Describe your vision in text, optionally apply custom LoRA adapters for personalized styles — all with fast generation and affordable pricing.

Why Choose This?

High-quality generation Generate detailed, high-fidelity images from text descriptions with strong prompt adherence.
LoRA support Apply custom LoRA adapters for personalized styles, characters, or visual aesthetics.
Flexible sizing Custom width and height controls for any aspect ratio.
Prompt Enhancer Built-in tool to automatically improve your prompts for better results.
Lightweight and fast 4B parameter model optimized for quick turnaround at affordable pricing.

Parameters

Parameter	Required	Description
prompt	Yes	Text description of the image you want to generate
width	No	Output width in pixels (default: 1024)
height	No	Output height in pixels (default: 1024)
loras	No	List of LoRA adapters to apply
seed	No	Random seed for reproducibility (-1 for random)

LoRA Format

Each LoRA in the loras array has:

path (required) — URL to the LoRA weights file
scale (optional) — Weight multiplier, default 1

How to Use

Write your prompt — describe the image including subject, style, lighting, and mood.
Set size — adjust width and height for your desired dimensions.
Add LoRAs (optional) — click "+ Add Item" to include custom LoRA adapters.
Set seed — use -1 for random, or specify a number for reproducibility.
Run — submit and download the generated image.

Pricing

Item	Cost
Per image	$0.015

Simple flat-rate pricing regardless of image size or LoRA count.

Best Use Cases

Custom Character Generation — Apply character LoRAs for consistent identity.
Style Personalization — Use style LoRAs for unique visual aesthetics.
Brand Content — Create on-brand visuals with trained LoRA styles.
Rapid Prototyping — Fast, affordable generation for creative iteration.
Batch Generation — Low cost enables large-scale image production.

Pro Tips

Be specific in your prompts — include subject, style, lighting, colors, and atmosphere.
Start with LoRA scale 1.0 and adjust based on results.
Combine multiple LoRAs for hybrid styles (e.g., character + art style).
Use the same seed to compare different prompts or LoRA combinations.
If your LoRA uses trigger words, include them in your prompt.

Notes

LoRAs can be stacked for combined effects.
For best results, use LoRAs trained on FLUX-compatible models.
Processing speed is optimized for quick turnaround.

Related Models

FLUX.2 Klein Base 4B Text-to-Image — Standard version without LoRA support.
FLUX.2 Klein Base 4B Edit LoRA — Image editing with LoRA support.
FLUX.2 Pro — Flagship-quality text-to-image generation.

Flux 2 Klein Base 4b Text To Image Lora API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/wavespeed-ai/flux-2-klein-base-4b/text-to-image-lora with your input as JSON. The endpoint returns a prediction id; poll the prediction endpoint until status flips to completed, then read the output URL from data.outputs[0]. Examples for Flux 2 Klein Base 4b Text To Image Lora below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/flux-2-klein-base-4b/text-to-image-lora" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY" \
  -d '{
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "size": "1024*1024",
    "seed": -1,
    "enable_sync_mode": false,
    "enable_base64_output": false
}'

# Response includes a prediction id. Poll for the result:
curl -X GET "https://api.wavespeed.ai/api/v3/predictions/{request_id}/result" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY"

# When status is "completed", read the output from data.outputs[0].

Node.js example

// npm install wavespeed
const WaveSpeed = require('wavespeed');

const client = new WaveSpeed(); // reads WAVESPEED_API_KEY from env

const result = await client.run("wavespeed-ai/flux-2-klein-base-4b/text-to-image-lora", {
        "prompt": "A cinematic shot of a city at sunset, soft golden light",
        "size": "1024*1024",
        "seed": -1,
        "enable_sync_mode": false,
        "enable_base64_output": false
});

console.log(result.outputs[0]); // → URL of the generated output

Python example

# pip install wavespeed
import wavespeed

output = wavespeed.run(
    "wavespeed-ai/flux-2-klein-base-4b/text-to-image-lora",
    {
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "size": "1024*1024",
    "seed": -1,
    "enable_sync_mode": false,
    "enable_base64_output": false
}
)

print(output["outputs"][0])  # → URL of the generated output

Flux 2 Klein Base 4b Text To Image Lora API — Frequently asked questions

What is the Flux 2 Klein Base 4b Text To Image Lora API?

Flux 2 Klein Base 4b Text To Image Lora is a WaveSpeedAI model for AI inference, exposed as a REST API on WaveSpeedAI. FLUX.2 [klein] Base 4B with LoRA support is a compact 4-billion-parameter text-to-image model that delivers fast generation with quality results and LoRA customization. Ready-to-use REST inference API, best performance, no cold starts, affordable pricing. You can call it programmatically or try it from the playground above.

How do I call the Flux 2 Klein Base 4b Text To Image Lora API?

POST your input parameters to the model's REST endpoint (shown in the API tab of this playground) with your WaveSpeedAI API key in the Authorization header. Submission returns a prediction ID; poll the prediction endpoint until status flips to "completed", then read the output URL from the result. The playground generates a ready-to-paste code sample in Python, JavaScript, or cURL for whatever inputs you've set. Full request/response shape is documented at https://wavespeed.ai/docs/docs-api/wavespeed-ai/flux-2-klein-base-4b-text-to-image-lora.

How much does Flux 2 Klein Base 4b Text To Image Lora cost per run?

Flux 2 Klein Base 4b Text To Image Lora starts at $0.015 per run. That figure is the base price — the final charge scales with the parameters you set in the form (output size, length, count, references, or whatever knobs this model exposes), so a higher-quality or larger output costs more than a minimal one. The exact cost for your current input is shown live next to the Generate button before you submit, and the actual per-call charge is recorded on the prediction afterwards.

What inputs does Flux 2 Klein Base 4b Text To Image Lora accept?

Key inputs: `prompt`, `size`, `seed`, `enable_base64_output`, `enable_sync_mode`, `loras`. The full JSON schema (types, defaults, allowed values) is rendered above the Generate button and mirrored in the API reference at https://wavespeed.ai/docs/docs-api/wavespeed-ai/flux-2-klein-base-4b-text-to-image-lora.

How do I get started with the Flux 2 Klein Base 4b Text To Image Lora API?

Sign up for a free WaveSpeedAI account to claim starter credits, copy your API key from /accesskey, then call the endpoint shown in the API tab of the playground. The playground also auto-generates a code sample in Python, JavaScript, or cURL for the parameters you've set.

Can I use Flux 2 Klein Base 4b Text To Image Lora outputs commercially?

Commercial usage rights depend on the model's license, set by its provider (WaveSpeedAI). The license summary appears on the model card above; see WaveSpeedAI's Terms of Service for platform-level conditions.

ExamplesView all

Related Models

README

FLUX.2 Klein Base 4B Text-to-Image LoRA

Why Choose This?

Parameters

LoRA Format

How to Use

Pricing

Best Use Cases

Pro Tips

Notes

Related Models

Flux 2 Klein Base 4b Text To Image Lora API — Quick start

Flux 2 Klein Base 4b Text To Image Lora API — Frequently asked questions