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Image model vs image model

FLUX.2 Klein 4B vs FLUX 3 Image Klein

People picked FLUX 3 Image Klein’s picture over FLUX.2 Klein 4B’s about 77% of the time in blind votes. FLUX.2 Klein 4B costs 1.8× less ($0.005 against $0.009 an image), so it wins when “good enough” will do.

By ModelCompare ·

$0.005 and $0.009 a picture, paid from your credits. New accounts start with free credit.

At a glance

Longer bar means the bigger number. Elo bars start at 800.

Blind votes · how often people would pick each picture

FLUX.2 Klein 4B FLUX 3 Image Klein

Price per image · 1024×1024, lower is better

FLUX.2 Klein 4B$0.005
FLUX 3 Image Klein$0.009

Text to image · arena Elo, higher is better

FLUX.2 Klein 4B837
FLUX 3 Image Klein1043

Editing · arena Elo, higher is better

FLUX.2 Klein 4B938
FLUX 3 Image Klein1072

Same prompt, both models

We give every image model the same fixed prompts and the same pictures to edit. Here is what FLUX.2 Klein 4B and FLUX 3 Image Klein made. Each made one picture per prompt; nothing was picked or retouched.

Photo

“A cozy bookshop on a rainy Tokyo street at night, warm window light, reflections on wet pavement, 35mm film photo”

FLUX.2 Klein 4B’s picture for “A cozy bookshop on a rainy Tokyo street at night, warm window light, reflections on wet pavement, 35mm film photo”

FLUX.2 Klein 4B

FLUX 3 Image Klein’s picture for “A cozy bookshop on a rainy Tokyo street at night, warm window light, reflections on wet pavement, 35mm film photo”

FLUX 3 Image Klein

Text in image

“A minimalist logo for a coffee brand called "Orbit Roasters", flat vector, two colours, the name clearly lettered”

FLUX.2 Klein 4B’s picture for “A minimalist logo for a coffee brand called "Orbit Roasters", flat vector, two colours, the name clearly lettered”

FLUX.2 Klein 4B

FLUX 3 Image Klein’s picture for “A minimalist logo for a coffee brand called "Orbit Roasters", flat vector, two colours, the name clearly lettered”

FLUX 3 Image Klein

Product shot

“A glass perfume bottle on wet black stone, soft studio lighting, water droplets, high-end product photography”

FLUX.2 Klein 4B’s picture for “A glass perfume bottle on wet black stone, soft studio lighting, water droplets, high-end product photography”

FLUX.2 Klein 4B

FLUX 3 Image Klein’s picture for “A glass perfume bottle on wet black stone, soft studio lighting, water droplets, high-end product photography”

FLUX 3 Image Klein

Image edit

The picture both models were asked to edit

Asked to edit this picture: “Make it a snowy winter morning. Keep the bookshop, the street and the camera angle the same.”

FLUX.2 Klein 4B’s picture for “Make it a snowy winter morning. Keep the bookshop, the street and the camera angle the same.”

FLUX.2 Klein 4B

FLUX 3 Image Klein’s picture for “Make it a snowy winter morning. Keep the bookshop, the street and the camera angle the same.”

FLUX 3 Image Klein

Edit with people

The picture both models were asked to edit

Asked to edit this picture: “Move them to a beach at sunset. Keep all three people's faces, expressions, hair and clothes exactly the same.”

FLUX.2 Klein 4B’s picture for “Move them to a beach at sunset. Keep all three people's faces, expressions, hair and clothes exactly the same.”

FLUX.2 Klein 4B

FLUX 3 Image Klein’s picture for “Move them to a beach at sunset. Keep all three people's faces, expressions, hair and clothes exactly the same.”

FLUX 3 Image Klein

Try your own prompt on both

Where they sit among all 56 image models

Up and to the left is better pictures for less money. Hover or tap a dot for its numbers, then click it to compare that model with FLUX.2 Klein 4B. Models the arena hasn’t rated yet sit in the grey lane at the bottom.

Quality: Elo from the Artificial Analysis text-to-image arena. Price: one 1024×1024 image, on a log scale. The dashed line joins the best picture you can get at each price.

Which one to pick

Pick FLUX.2 Klein 4B if

  • price matters: 100 images cost $0.50, against $0.90 with FLUX 3 Image Klein

Pick FLUX 3 Image Klein if

  • you want the better picture: in blind votes people chose its image over FLUX.2 Klein 4B’s about 77% of the time
  • you mostly edit pictures: it scores higher in the editing arena (Elo 1072 against 938)

See what both make of your prompt

The specs

Spec FLUX.2 Klein 4B FLUX 3 Image Klein
Price per image$0.005 ($0.02 per edit)$0.009
100 images$0.50$0.90
Text-to-image Elo837 ±12 (#96 in the arena)1043 ±12 (#21 in the arena)
Editing Elo938 ±17 (#62 in the arena)1072 ±14 (#26 in the arena)
Arena votes6,4185,184
Edits uploaded picturesYesYes
Largest size—4096x4096
Open weightsYesYes
Zero data retention—No
LabBlack Forest LabsBlack Forest Labs
Official nameFLUX.2 [klein] 4BFLUX 3 Image Klein
ReleasedJanuary 2026October 2026

Elo ± is the 95% margin. Prices are for one 1024×1024 image from the Vercel AI Gateway and fal.ai.

Questions

Which is better, FLUX.2 Klein 4B or FLUX 3 Image Klein?

People picked FLUX 3 Image Klein’s picture over FLUX.2 Klein 4B’s about 77% of the time in blind votes. FLUX.2 Klein 4B costs 1.8× less ($0.005 against $0.009 an image), so it wins when “good enough” will do.

Which is cheaper, FLUX.2 Klein 4B or FLUX 3 Image Klein?

FLUX.2 Klein 4B: $0.005 for a 1024×1024 image, against $0.009 for FLUX 3 Image Klein. 100 images cost $0.50 and $0.90.

Can FLUX.2 Klein 4B and FLUX 3 Image Klein edit images?

Yes, both can change a picture you upload. In the Artificial Analysis editing arena FLUX.2 Klein 4B has an Elo of 938 and FLUX 3 Image Klein 1072.

How can I compare FLUX.2 Klein 4B and FLUX 3 Image Klein myself?

Open the comparison, type one prompt and both models draw it side by side, each with what it cost and how long it took. You sign up with Google before your first run, and new accounts start with free credit.

Still deciding? Send one prompt to both and see the pictures side by side, with what each one cost. Compare FLUX.2 Klein 4B and FLUX 3 Image Klein →

Where the numbers come from

Quality scores are Elo ratings from the Artificial Analysis image arenas, where people vote between two pictures made from the same prompt without knowing which model made which. The vote split comes from the Elo gap. Prices are for one 1024×1024 image from the Vercel AI Gateway and fal.ai; models billed per token are estimated at the quality the arena scored. The sample pictures are our own runs. Updated October 25, 2026.