Image model vs image model
FLUX.1 Schnell vs FLUX.2 Klein 4B
People picked FLUX.2 Klein 4B’s picture over FLUX.1 Schnell’s about 64% of the time in blind votes. FLUX.1 Schnell costs 1.7× less ($0.003 against $0.005 an image), so it wins when “good enough” will do.
At a glance
Longer bar means the bigger number. Elo bars start at 800.
Blind votes · how often people would pick each picture
FLUX.1 Schnell FLUX.2 Klein 4B
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.1 Schnell. Models the arena hasn’t rated yet sit in the grey lane at the bottom.
Which one to pick
Pick FLUX.1 Schnell if
- price matters: 100 images cost $0.30, against $0.50 with FLUX.2 Klein 4B
Pick FLUX.2 Klein 4B if
- you want the better picture: in blind votes people chose its image over FLUX.1 Schnell’s about 64% of the time
- you need to edit pictures you upload; FLUX.1 Schnell only makes new ones here
The specs
| Spec | FLUX.1 Schnell | FLUX.2 Klein 4B |
|---|---|---|
| Price per image | $0.003 | $0.005 ($0.02 per edit) |
| 100 images | $0.30 | $0.50 |
| Text-to-image Elo | 740 ±20 (#104 in the arena) | 837 ±12 (#96 in the arena) |
| Editing Elo | Not scored yet | 938 ±17 (#62 in the arena) |
| Arena votes | 3,045 | 6,418 |
| Edits uploaded pictures | No | Yes |
| Largest size | — | — |
| Open weights | Yes | Yes |
| Zero data retention | — | — |
| Lab | Black Forest Labs | Black Forest Labs |
| Official name | FLUX.1 [schnell] | FLUX.2 [klein] 4B |
| Released | August 2024 | January 2026 |
Elo ± is the 95% margin. Prices are for one 1024×1024 image from fal.ai.
Questions
Which is better, FLUX.1 Schnell or FLUX.2 Klein 4B?
People picked FLUX.2 Klein 4B’s picture over FLUX.1 Schnell’s about 64% of the time in blind votes. FLUX.1 Schnell costs 1.7× less ($0.003 against $0.005 an image), so it wins when “good enough” will do.
Which is cheaper, FLUX.1 Schnell or FLUX.2 Klein 4B?
FLUX.1 Schnell: $0.003 for a 1024×1024 image, against $0.005 for FLUX.2 Klein 4B. 100 images cost $0.30 and $0.50.
Can FLUX.1 Schnell and FLUX.2 Klein 4B edit images?
FLUX.2 Klein 4B can change a picture you upload. FLUX.1 Schnell only makes new pictures from a prompt here.
How can I compare FLUX.1 Schnell and FLUX.2 Klein 4B 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.
Related comparisons
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.