Text to image
Elo · text-to-image arena
Custom pricing for production workloads
Compact 4B FLUX.2 model optimized for efficient generation.
blackforestlabs/flux-2-klein-4bPOST https://api.aimlapi.com/v1/images/generationsCompact 4B FLUX.2 model optimized for efficient generation.
FLUX.2 Klein 4B API Pricing
- Pricing on request
High-volume image generation
Produce product visuals, thumbnails, and marketing assets programmatically at scale.
Creative and concept art
Turn text prompts into illustrations, mockups, and design explorations.
FLUX.2 Klein 4B is documented as suited to interactive applications, real-time previews, and latency-critical production use cases.
It is also documented as suitable for content creation and rapid prototyping, especially where low-latency generation is important.
The model is documented for image generation from text descriptions, making text-to-image workflows a stated use case.
It is documented for image editing and multi-reference editing, including tasks such as inpainting, style transfer, and object manipulation.
Human-preference results for FLUX.2 Klein 4B in text to image, next to models available on AI/ML API. Data retrieved Nov 3, 2026.
Elo · text-to-image arena
USD per Megapixel
Arena results for models you can call with the same API key.
Blind pairwise human votes on images generated from text prompts. FLUX.2 Klein 4B ranks #88 of 98.
| Usage | Price | Unit |
|---|---|---|
| Image generation | $0.014 | per Megapixel |
The final price depends on request parameters such as resolution or duration.
Prices from the AI/ML API price list, checked on Nov 4, 2026.
AI/ML API rates for 5 models, per Megapixel.
| Model | Per Megapixel |
|---|---|
| $0.014 | |
| $0.015 | |
| $0.015 | |
| $0.03 | |
| $0.05 |
Give your agent the model details, code and documentation.
export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"curl 'https://api.aimlapi.com/v1/images/generations' \
-H "Authorization: Bearer $AIMLAPI_KEY" \
-H 'Content-Type: application/json' \
-d '{
"model": "blackforestlabs/flux-2-klein-4b",
"prompt": "A ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
}'import os
import requests
headers = {
"Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
"Content-Type": "application/json",
}
payload = {
"model": "blackforestlabs/flux-2-klein-4b",
"prompt": "A ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
}
response = requests.post("https://api.aimlapi.com/v1/images/generations", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())const response = await fetch("https://api.aimlapi.com/v1/images/generations", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
"model": "blackforestlabs/flux-2-klein-4b",
"prompt": "A ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
}),
});
if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());FLUX.2 Klein 4B takes image, text as input and returns image.
FLUX.2 Klein 4B became available on June 12, 2026.
FLUX.2 Klein 4B costs $0.014 per Megapixel on AI/ML API, billed as you go with no subscription.
FLUX.2 Klein 4B is billed per generation, a fixed charge per output rather than by prompt length.
Yes, FLUX.2 Klein 4B accepts image input as well as a text prompt.
FLUX.2 Klein 4B was built by Black Forest Labs.
Send a request to https://api.aimlapi.com/v1/images/generations with blackforestlabs/flux-2-klein-4b as the model id.
Yes. FLUX.2 Klein 4B is served through AI/ML API, so the same key and endpoint format used for other models applies.
FLUX.2 Klein 4B is a 4 billion parameter model, as indicated by its name.
It is a compact 4B version of FLUX.2 built for efficient image generation.