Image model vs image model
SRPO vs Z-Image Base
People picked Z-Image Base’s picture over SRPO’s about 59% of the time in blind votes, and it costs 2.5× less: $0.025 against $0.01 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
SRPO 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 SRPO. Models the arena hasn’t rated yet sit in the grey lane at the bottom.
Which one to pick
Pick Z-Image Base if
- you want the better picture: in blind votes people chose its image over SRPO’s about 59% of the time
- price matters: 100 images cost $1.00, against $2.50 with SRPO
The specs
| Spec | SRPO | Z-Image Base |
|---|---|---|
| Price per image | $0.025 | $0.01 |
| 100 images | $2.50 | $1.00 |
| Text-to-image Elo | 826 ±20 (#99 in the arena) | 891 ±17 (#87 in the arena) |
| Editing Elo | Not scored yet | Not scored yet |
| Arena votes | 2,154 | 2,500 |
| Edits uploaded pictures | No | No |
| Largest size | — | — |
| Open weights | Yes | Yes |
| Zero data retention | — | — |
| Lab | Tencent | Alibaba |
| Official name | SRPO | Z-Image Base |
| Released | September 2025 | January 2026 |
Elo ± is the 95% margin. Prices are for one 1024×1024 image from fal.ai.
Questions
Which is better, SRPO or Z-Image Base?
People picked Z-Image Base’s picture over SRPO’s about 59% of the time in blind votes, and it costs 2.5× less: $0.025 against $0.01 an image.
Which is cheaper, SRPO or Z-Image Base?
Z-Image Base: $0.01 for a 1024×1024 image, against $0.025 for SRPO. 100 images cost $1.00 and $2.50.
Can SRPO and Z-Image Base edit images?
Not on ModelCompare: both only make new pictures from a prompt here.
How can I compare SRPO 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 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.