Image model vs image model
FLUX.2 Dev Flash vs FLUX.2 Klein 9B
People picked FLUX.2 Dev Flash’s picture over FLUX.2 Klein 9B’s about 58% of the time in blind votes, and it costs 1.2× less: $0.005 against $0.006 an image.
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 Dev Flash FLUX.2 Klein 9B
Price per image · 1024×1024, lower is better
Text to image · arena Elo, higher is better
Editing · 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 Dev Flash. Models the arena hasn’t rated yet sit in the grey lane at the bottom.
Which one to pick
Pick FLUX.2 Dev Flash if
- you want the better picture: in blind votes people chose its image over FLUX.2 Klein 9B’s about 58% of the time
- price matters: 100 images cost $0.50, against $0.60 with FLUX.2 Klein 9B
The specs
| Spec | FLUX.2 Dev Flash | FLUX.2 Klein 9B |
|---|---|---|
| Price per image | $0.005 ($0.01 per edit) | $0.006 ($0.022 per edit) |
| 100 images | $0.50 | $0.60 |
| Text-to-image Elo | 988 ±12 (#55 in the arena) | 929 ±10 (#75 in the arena) |
| Editing Elo | 1012 ±18 (#44 in the arena) | 1015 ±13 (#43 in the arena) |
| Arena votes | 5,344 | 10,730 |
| Edits uploaded pictures | Yes | Yes |
| Largest size | — | — |
| Open weights | Yes | Yes |
| Zero data retention | — | — |
| Lab | fal | Black Forest Labs |
| Official name | FLUX.2 [dev] Flash | FLUX.2 [klein] 9B |
| Released | December 2025 | January 2026 |
Elo ± is the 95% margin. Prices are for one 1024×1024 image from fal.ai.
Questions
Which is better, FLUX.2 Dev Flash or FLUX.2 Klein 9B?
People picked FLUX.2 Dev Flash’s picture over FLUX.2 Klein 9B’s about 58% of the time in blind votes, and it costs 1.2× less: $0.005 against $0.006 an image.
Which is cheaper, FLUX.2 Dev Flash or FLUX.2 Klein 9B?
FLUX.2 Dev Flash: $0.005 for a 1024×1024 image, against $0.006 for FLUX.2 Klein 9B. 100 images cost $0.50 and $0.60.
Can FLUX.2 Dev Flash and FLUX.2 Klein 9B edit images?
Yes, both can change a picture you upload. In the Artificial Analysis editing arena FLUX.2 Dev Flash has an Elo of 1012 and FLUX.2 Klein 9B 1015.
How can I compare FLUX.2 Dev Flash and FLUX.2 Klein 9B 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.