Image model vs image model
FLUX.2 Klein 4B vs LongCat Image
People rate their pictures about the same in blind votes, so the cheaper FLUX.2 Klein 4B is the better buy: $0.005 against $0.13 an image.
At a glance
Longer bar means the bigger number. Elo bars start at 800.
Price per image · 1024×1024, lower is better
Text to image · arena Elo, higher is better
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.
Which one to pick
Pick FLUX.2 Klein 4B if
- price matters: 100 images cost $0.50, against $13.00 with LongCat Image
- you need to edit pictures you upload; LongCat Image only makes new ones here
The specs
| Spec | FLUX.2 Klein 4B | LongCat Image |
|---|---|---|
| Price per image | $0.005 ($0.02 per edit) | $0.13 |
| 100 images | $0.50 | $13.00 |
| Text-to-image Elo | 837 ±12 (#96 in the arena) | 856 ±19 (#92 in the arena) |
| Editing Elo | 938 ±17 (#62 in the arena) | Not scored yet |
| Arena votes | 6,418 | 2,146 |
| Edits uploaded pictures | Yes | No |
| Largest size | — | — |
| Open weights | Yes | Yes |
| Zero data retention | — | — |
| Lab | Black Forest Labs | Meituan |
| Official name | FLUX.2 [klein] 4B | LongCat Image |
| Released | January 2026 | December 2025 |
Elo ± is the 95% margin. Prices are for one 1024×1024 image from fal.ai.
Questions
Which is better, FLUX.2 Klein 4B or LongCat Image?
People rate their pictures about the same in blind votes, so the cheaper FLUX.2 Klein 4B is the better buy: $0.005 against $0.13 an image.
Which is cheaper, FLUX.2 Klein 4B or LongCat Image?
FLUX.2 Klein 4B: $0.005 for a 1024×1024 image, against $0.13 for LongCat Image. 100 images cost $0.50 and $13.00.
Can FLUX.2 Klein 4B and LongCat Image edit images?
FLUX.2 Klein 4B can change a picture you upload. LongCat Image only makes new pictures from a prompt here.
How can I compare FLUX.2 Klein 4B and LongCat Image 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.
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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 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.