
Flux Klien 9B
by ModelsLabA distilled version of Flux Klien 9B that matches or exceeds leading competitors with only 8 NFEs (Number of Function Evaluations)
Input
Output
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Built for speed when you are iterating on a prompt.
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About Flux Klien 9B
Flux Klien 9B is a text to image AI model, available on ModelsLab through the API and the playground above. API access starts at $21/month, and open-source models are unlimited on the $149/month plan.
Flux Klien 9B facts
- Provider
- ModelsLab
- Price
- $0.0047 per image
- Added to ModelsLab
- March 11, 2026
- Model ID
- flux-klein
Sample outputs

A colorful and attractive children's wall newspaper (روزنامه دیواری) about stainless steel. In the center, there is a cute cartoon character of a shiny, smiling stainless steel spoon or pot wearing an invisible protective shield. The content is organized in colorful boxes, small clouds, and beautiful geometric shapes. Small illustrations of stainless steel medical tools and kitchenware are scattered around. The overall atmosphere is happy, educational, and child-friendly. The text is represente...

An educational and attractive poster for 9th-grade social studies (Lesson 5) showing various biomes in one comprehensive and simple image. The image should include: 1. Tundra (frozen landscape with low vegetation), 2. Taiga (coniferous forests), 3. Tropical Rainforests (tall green trees), 4. Grasslands/Savanna, 5. Desert (sand and cacti), and 6. Aquatic biome (ocean/sea). Each section should feature its respective animals (e.g., lion, zebra, camel, polar bear, dolphin, etc.) and characteristic...

A highly realistic photo of the boy from the first image (1000336064.jpg), strictly preserving his exact facial features, age, and natural appearance. He is placed in a very simple and neutral environment, such as a plain room or a basic outdoor setting. The primary focus is to ensure the face is an exact match to the original photo, with no changes to his age or facial structure. hyperrealistic, full body, detailed clothing, highly detailed, cinematic lighting, stunningly beautiful, intricate,...

A colorful and educational wall newspaper (poster) for children about stainless steel in Persian. The image should feature different sections: a cute cartoon character of a shiny, smiling steel soldier holding an invisible shield, illustrations of spoons, forks, and medical tools. A large title at the top in beautiful Persian calligraphy saying "قهرمان براق: استیل" (The Shiny Hero: Steel). The overall atmosphere should be joyful, motivational, and inspiring, using bright colors and engaging sch...
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 to get started.
import requestsimport jsonurl = "https://modelslab.com/api/v6/images/text2img"headers = {"Content-Type": "application/json"}data = {"model_id": "flux-klein","prompt": "A highly detailed, ultra-realistic scene inside a modern McDonald’s restaurant. At the counter stands a friendly anthropomorphic creature resembling a furry monster or gentle beast. The creature has thick golden-brown fur, expressive round eyes, a wide flat nose, and a soft, friendly facial expression.","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}")
const endpointUrl = 'https://modelslab.com/api/v6/images/text2img';const requestBody = {"model_id": "flux-klein","prompt": "A highly detailed, ultra-realistic scene inside a modern McDonald’s restaurant. At the counter stands a friendly anthropomorphic creature resembling a furry monster or gentle beast. The creature has thick golden-brown fur, expressive round eyes, a wide flat nose, and a soft, friendly facial expression.","key": "YOUR_API_KEY"};async function makeApiRequest() {try {const response = await fetch(endpointUrl, {method: 'POST',headers: {'Content-Type': 'application/json',},body: JSON.stringify(requestBody)});if (!response.ok) {let errorResult;try {errorResult = await response.json();} catch (e) {errorResult = { error: { message: await response.text() } };}throw new Error(`API Error (${response.status}): ${errorResult.error?.message || response.statusText || 'Unknown error'}`);}const result = await response.json();console.log('API Response:', result);return result;} catch (error) {console.error('Error making API request:', error.message);throw error;}}makeApiRequest();
curl -X POST "https://modelslab.com/api/v6/images/text2img" \-H "Content-Type: application/json" \-d '{"model_id": "flux-klein","prompt": "A highly detailed, ultra-realistic scene inside a modern McDonald’s restaurant. At the counter stands a friendly anthropomorphic creature resembling a furry monster or gentle beast. The creature has thick golden-brown fur, expressive round eyes, a wide flat nose, and a soft, friendly facial expression.","key": "YOUR_API_KEY"}'
<?php$url = 'https://modelslab.com/api/v6/images/text2img';$headers = ['Content-Type: application/json'];$data = ['model_id' => 'flux-klein','prompt' => 'A highly detailed, ultra-realistic scene inside a modern McDonald’s restaurant. At the counter stands a friendly anthropomorphic creature resembling a furry monster or gentle beast. The creature has thick golden-brown fur, expressive round eyes, a wide flat nose, and a soft, friendly facial expression.','key' => 'YOUR_API_KEY',];$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_POST, true);curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);curl_setopt($ch, CURLOPT_TIMEOUT, 30);$response = curl_exec($ch);$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);$curlError = curl_error($ch);if ($curlError) {echo 'Curl error: ' . $curlError;} else {echo "HTTP Status Code: " . $httpCode . "\n";$result = json_decode($response, true);if (json_last_error() !== JSON_ERROR_NONE) {echo "Error decoding JSON: " . json_last_error_msg() . "\n";echo "Raw response: " . $response . "\n";} else {echo "API Response:\n";print_r($result);}}?>
Pricing
Flux Klien 9B API costs $0.0047 per generation. Plans start at $21/month, and open-source models are unlimited on the $149/month plan. View pricing plans
Use Cases
- Product photography and e-commerce visuals
- Marketing and social media content creation
- Concept art and design prototyping
- Custom illustrations and artwork


