Image model vs image model
FLUX.1 Kontext Pro vs Z-Image Base
People picked FLUX.1 Kontext Pro’s picture over Z-Image Base’s about 54% of the time in blind votes. Z-Image Base costs 4× less ($0.04 against $0.01 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 Kontext Pro Z-Image Base
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 Kontext Pro. Models the arena hasn’t rated yet sit in the grey lane at the bottom.
Which one to pick
Pick FLUX.1 Kontext Pro if
- you want the better picture: in blind votes people chose its image over Z-Image Base’s about 54% of the time
- you need to edit pictures you upload; Z-Image Base only makes new ones here
Pick Z-Image Base if
- price matters: 100 images cost $1.00, against $4.00 with FLUX.1 Kontext Pro
- you want open weights you can run yourself
The specs
| Spec | FLUX.1 Kontext Pro | Z-Image Base |
|---|---|---|
| Price per image | $0.04 | $0.01 |
| 100 images | $4.00 | $1.00 |
| Text-to-image Elo | 917 ±18 (#78 in the arena) | 891 ±17 (#87 in the arena) |
| Editing Elo | 916 ±19 (#65 in the arena) | Not scored yet |
| Arena votes | 2,229 | 2,500 |
| Edits uploaded pictures | Yes | No |
| Largest size | — | — |
| Open weights | No | Yes |
| Zero data retention | No | — |
| Lab | Black Forest Labs | Alibaba |
| Official name | FLUX.1 Kontext Pro | Z-Image Base |
| Released | May 2025 | January 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.1 Kontext Pro or Z-Image Base?
People picked FLUX.1 Kontext Pro’s picture over Z-Image Base’s about 54% of the time in blind votes. Z-Image Base costs 4× less ($0.04 against $0.01 an image), so it wins when “good enough” will do.
Which is cheaper, FLUX.1 Kontext Pro or Z-Image Base?
Z-Image Base: $0.01 for a 1024×1024 image, against $0.04 for FLUX.1 Kontext Pro. 100 images cost $1.00 and $4.00.
Can FLUX.1 Kontext Pro and Z-Image Base edit images?
FLUX.1 Kontext Pro can change a picture you upload. Z-Image Base only makes new pictures from a prompt here.
How can I compare FLUX.1 Kontext Pro and Z-Image Base 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 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.