FLUX.2 [klein] 4B
Description
A highly optimized, distilled version of the FLUX architecture designed for lightning-fast generations without compromising on quality. It specializes in real-time creative workflows, offering an ideal balance of speed and artistic detail for high-performance applications.
At a Glance
Key pricing and model details available for this model.
Starting price
$0.01
per image
Hallucination rate
0%
Supported sizes
1024x1024, 1280x720, 720x1280, 1536x1024, 1024x1536, 1536x1536
Image Pricing
Image generation pricing currently exposed by the models API.
Starting price
$0.01
per image
Resolution Pricing
Resolution-specific prices returned for this image model.
| 1024x1024 | $0.01 |
| 1024x1536 | $0.01 |
| 1280x720 | $0.01 |
| 1536x1024 | $0.01 |
| 1536x1536 | $0.01 |
| 720x1280 | $0.01 |
| auto | $0.01 |
Image Details
Additional image-related pricing and format support.
| Pricing unit | per image |
| Supported sizes | 1024x1024 1280x720 720x1280 1536x1024 1024x1536 1536x1536 |
Feature Availability
Capabilities explicitly listed in the current payload.
Image
Available
Vision
Not listed
Function calling
Not listed
Reasoning
Not listed
Benchmark Summary
Overall image benchmark metrics currently available. CI95: -10/10
Overall ELO
1069
Rank
#54
Appearances
4,451
Category Breakdown
Available per-category ELO results from the current benchmark payload.
Style Traditional Art
304 appearances · CI95 -40/40
1176
ELO
Subject Fantasy Mythical
749 appearances · CI95 -25/25
1122
ELO
Subject Nature Landscapes
445 appearances · CI95 -33/33
1116
ELO
Subject People: Groups Activities
471 appearances · CI95 -33/33
1108
ELO
Style General Photorealistic
1,774 appearances · CI95 -16/16
1105
ELO
Subject People: Portraits
538 appearances · CI95 -30/30
1090
ELO
Subject Physical Spaces
602 appearances · CI95 -28/28
1089
ELO
Style Anime
355 appearances · CI95 -37/37
1086
ELO
Subject Commercial
225 appearances · CI95 -47/47
1071
ELO
Style Cartoon Illustration
392 appearances · CI95 -36/36
1066
ELO
Subject Futuristic Sci-fi
598 appearances · CI95 -28/28
1060
ELO
Style Graphic Design Digital Rendering
1,221 appearances · CI95 -20/20
1015
ELO
Style Vintage Retro
202 appearances · CI95 -52/52
983
ELO
Subject Ui/ux Design
133 appearances · CI95 -64/64
949
ELO
Subject Text Typography
183 appearances · CI95 -55/55
944
ELO
Code Samples
Quick start with the Routeway API
const response = await fetch('https://api.routeway.ai/v1/images/generations', {
method: 'POST',
headers: {
'Authorization': 'Bearer <YOUR_API_KEY>',
'Content-Type': 'application/json'
},
body: JSON.stringify({
model: 'flux-2-klein-4b',
prompt: 'A futuristic city skyline at sunset',
size: '1024x1024',
})
});
const imageData = await response.json();
console.log(imageData);