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FLUX.2 [max] vs Kling Image O3

FLUX.2 [max] from Black Forest Labs and Kling Image O3 from Kuaishou, run on the same six prompts. Which one is better depends on the prompt, so the images are the comparison; the facts below are what differs regardless of prompt.

What differs

  • FLUX.2 [max] costs 3 credits per megapixel, 1.5× the 2 credits of Kling Image O3.
  • ImageForge lists Typography as a strength of FLUX.2 [max] but not of Kling Image O3.
  • FLUX.2 [max] renders 5:4 and 4:5 natively; Kling Image O3 snaps those ratios to the nearest size it supports.
FLUX.2 [max]Kling Image O3
ProviderBlack Forest LabsKuaishou
Credits per megapixel32
RefinementYesYes
Native aspect ratios10 of 108 of 10
Listed strengthsRealism, TypographyRealism

Same prompt, both models

Unedited, at 1 megapixel, with the exact prompt each pair was given. How we ran the test.

Photorealism

What to look for: skin texture, natural light and a believable shallow depth of field.

“Close-up portrait of an elderly fisherman with a weathered face and grey stubble, wearing a yellow raincoat, soft overcast light from a window, shallow depth of field, 85mm photograph”

Close-up portrait of an elderly fisherman with a weathered face and grey stubble, wearing a yellow raincoat, soft overcast light from a window, shallow depth of field, 85mm photograph, generated by FLUX.2 [max]
FLUX.2 [max]
Close-up portrait of an elderly fisherman with a weathered face and grey stubble, wearing a yellow raincoat, soft overcast light from a window, shallow depth of field, 85mm photograph, generated by Kling Image O3
Kling Image O3

Text rendering

What to look for: both lines of text spelled correctly and placed on the sign, not floating beside it.

“A vintage enamel sign on a brick wall that reads "FRESH BREAD DAILY" in bold red serif letters, with "since 1962" in smaller script below, morning sunlight”

A vintage enamel sign on a brick wall that reads "FRESH BREAD DAILY" in bold red serif letters, with "since 1962" in smaller script below, morning sunlight, generated by FLUX.2 [max]
FLUX.2 [max]
A vintage enamel sign on a brick wall that reads "FRESH BREAD DAILY" in bold red serif letters, with "since 1962" in smaller script below, morning sunlight, generated by Kling Image O3
Kling Image O3

Product shot

What to look for: glass, metal and water rendered convincingly in one studio setup.

“A frosted glass perfume bottle with a brass cap on wet black slate, droplets on the glass, soft rim light, reflections on the stone, studio product photography”

A frosted glass perfume bottle with a brass cap on wet black slate, droplets on the glass, soft rim light, reflections on the stone, studio product photography, generated by FLUX.2 [max]
FLUX.2 [max]
A frosted glass perfume bottle with a brass cap on wet black slate, droplets on the glass, soft rim light, reflections on the stone, studio product photography, generated by Kling Image O3
Kling Image O3

Prompt adherence

What to look for: exactly three red cubes on the sphere, with the cone on the left and the cylinder on the right.

“Three red cubes stacked on top of a blue sphere, a green cone to the left and a yellow cylinder to the right, on a black and white checkerboard floor, soft studio lighting”

Three red cubes stacked on top of a blue sphere, a green cone to the left and a yellow cylinder to the right, on a black and white checkerboard floor, soft studio lighting, generated by FLUX.2 [max]
FLUX.2 [max]
Three red cubes stacked on top of a blue sphere, a green cone to the left and a yellow cylinder to the right, on a black and white checkerboard floor, soft studio lighting, generated by Kling Image O3
Kling Image O3

Illustration

What to look for: a consistent watercolor-and-ink style rather than a photo with a filter.

“Children's book illustration of a fox in a knitted scarf reading a book under a large mushroom in light rain, soft watercolor and ink, warm palette”

Children's book illustration of a fox in a knitted scarf reading a book under a large mushroom in light rain, soft watercolor and ink, warm palette, generated by FLUX.2 [max]
FLUX.2 [max]
Children's book illustration of a fox in a knitted scarf reading a book under a large mushroom in light rain, soft watercolor and ink, warm palette, generated by Kling Image O3
Kling Image O3

Complex scene

What to look for: mixed light sources, wet reflections and several subjects in one frame.

“A narrow street in Tokyo at night after rain, neon signs reflecting in puddles, a cyclist with an umbrella passing a lit ramen shop, cinematic”

A narrow street in Tokyo at night after rain, neon signs reflecting in puddles, a cyclist with an umbrella passing a lit ramen shop, cinematic, generated by FLUX.2 [max]
FLUX.2 [max]
A narrow street in Tokyo at night after rain, neon signs reflecting in puddles, a cyclist with an umbrella passing a lit ramen shop, cinematic, generated by Kling Image O3
Kling Image O3

Free account, 5 credits a month, no card required. Your prompt is waiting in the studio when you sign up.

Sending one prompt to several models at once is part of the Basic and Pro plans.