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
Service tiers
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);