--- title: Flux Klien 9B API | Image to Image | ModelsLab description: Flux Klein 9B is a powerful AI text-to-image & image-to-image model that transforms existing images using text prompts. url: https://modelslab.com/models/modelslab/flux-klien-9b-image-to-image.md canonical: https://modelslab.com/models/modelslab/flux-klien-9b-image-to-image.md type: product component: Playground/Endpoint/Index generated_at: 2026-05-01T12:49:45.546510Z --- [![Flux Klien 9B thumbnail](https://assets.modelslab.ai/api-logos/01KPMZY676ZM0Z7YJWBM9C78QP.png)](https://modelslab.com/models/modelslab)Flux Klien 9B --- [by Modelslab](https://modelslab.com/models/modelslab)Flux Klien 9B Model transform an existing image into a new version using a text prompt, rather than generating a picture from scratch. You upload a source image and then describe how you want it changed `flux-klein` Open Source Model [Unlimited Usage](https://modelslab.com/pricing) [LLMs.txt](https://modelslab.com/models/modelslab/flux-klein/llms.txt) [Learn more](https://modelslab.com/flux-klien-9b) Endpoint:Select Endpoint [API Playground](/models/modelslab/flux-klien-9b-image-to-image) [API Documentation](/models/modelslab/flux-klien-9b-image-to-image/api)Vibe CodeRelated ModelsDeveloper SupportModel Specs Input --- Reference Image Add Images orAdd URL File preview Prompt Young woman in red Hanfu, intricate embroidery. Impeccable makeup, red floral forehead pattern. Elaborate high bun, golden phoenix headdress, red flowers, beads. Holds round folding fan with lady, trees, bird. Neon lightning-bolt lamp, bright yellow glow, above extended left palm. Soft-lit outdoor night background, silhouetted tiered pagoda, blurred colorful distant lights. Advanced Settings Customize your input with more control. Configure Add FundsLogin to Generate **Per image generation** will cost **0.0047$** **For premium plan image generation** will **cost 0.00$** i.e **Free.** Output --- Idle Unknown content type Related Models --- Discover similar models you might be interested in [View all Image Models](https://modelslab.com/models?feature=imagen) [![Flux](https://images.stablediffusionapi.com/?Image=https://assets.modelslab.ai/generations/b445e176-1565-48ec-b0f4-816bd42e3ce5.webp)](https://modelslab.com/models/modelslab/flux)[ModelsLab](https://modelslab.com/models/modelslab) [Flux Open Source Model](https://modelslab.com/models/modelslab/flux) [![Nano banana Text To Image](https://images.stablediffusionapi.com/?Image=https://assets.modelslab.ai/generations/3b150969-673b-4e9a-8e8b-85210e8a89e7.webp)](https://modelslab.com/models/google/nano-banana-t2i)[Google](https://modelslab.com/models/google) [Nano banana Text To Image Closed Source Model](https://modelslab.com/models/google/nano-banana-t2i) 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Access Flux Klien 9B through our API with pay-per-use pricing and no minimum commitments. ### Technical Specifications Model IDflux-kleinProviderModelslabCategoryImage ModelsTaskText to ImagePrice$0.004700 per generationAddedMarch 11, 2026 ### Key Features - High-resolution AI image generation from text prompts - Negative prompt support for precise control - Multiple output formats and aspect ratios - Adjustable inference steps and guidance scale - Batch generation support via API ### Quick Start Integrate Flux Klien 9B into your application with a single API call. Get your API key from the [pricing page](https://modelslab.com/pricing) to get started. PythonJavaScriptcURLPHP ``` import requests import json url = "https://modelslab.com/api/v6/images/img2img" headers = { "Content-Type": "application/json" } data = { "model_id": "flux-klein", "prompt": "your prompt here", "key": "YOUR_API_KEY" } try: response = requests.post(url, headers=headers, json=data) response.raise_for_status() # Raises an HTTPError for bad responses (4XX or 5XX) result = response.json() print("API Response:") print(json.dumps(result, indent=2)) except requests.exceptions.HTTPError as http_err: print(f"HTTP error occurred: {http_err} - {response.text}") except Exception as err: print(f"Other error occurred: {err}") ``` View the [full API documentation](https://modelslab.com/models/modelslab/flux-klein/api) for SDKs, code examples in Python, JavaScript, and more. ### Pricing Flux Klien 9B API costs $0.004700 per generation. Pay only for what you use with no minimum commitments. [View pricing plans](https://modelslab.com/pricing) ### Use Cases - Product photography and e-commerce visuals - Marketing and social media content creation - Concept art and design prototyping - Custom illustrations and artwork [Learn more about Flux Klien 9B ](https://modelslab.com/flux-klien-9b) [Browse Image Models](https://modelslab.com/models?feature=imagen) [More from Modelslab](https://modelslab.com/models/modelslab) [View Pricing](https://modelslab.com/pricing) Flux Klien 9B FAQ --- ### What is Flux Klien 9B ? Flux Klien 9B is a text to image AI model available on ModelsLab. Access it through our API with pay-per-use pricing and no minimum commitments. ### How do I use the Flux Klien 9B API? You can integrate Flux Klien 9B into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "flux-klein" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation. ### How much does Flux Klien 9B cost? Flux Klien 9B costs $0.004700 per generation. ModelsLab uses pay-per-use pricing with no minimum commitments. A free tier is available to get started. ### What is the Flux Klien 9B model ID? The model ID for Flux Klien 9B is "flux-klein". Use this ID in your API requests to specify this model. ### Does Flux Klien 9B have a free tier? Yes, ModelsLab offers a free tier that lets you try Flux Klien 9B and other AI models. Sign up to get free API credits and start building immediately. --- *This markdown version is optimized for AI agents and LLMs.* **Links:** - [Website](https://modelslab.com) - [API Documentation](https://docs.modelslab.com) - [Blog](https://modelslab.com/blog) --- *Generated by ModelsLab - 2026-05-01*