Image model vs image model
LongCat Image vs Seedream 4.5
People picked Seedream 4.5’s picture over LongCat Image’s about 73% of the time in blind votes, and it costs 3.3× less: $0.13 against $0.04 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
LongCat Image Seedream 4.5
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 LongCat Image. Models the arena hasn’t rated yet sit in the grey lane at the bottom.
Which one to pick
Pick LongCat Image if
- you want open weights you can run yourself
Pick Seedream 4.5 if
- you want the better picture: in blind votes people chose its image over LongCat Image’s about 73% of the time
- price matters: 100 images cost $4.00, against $13.00 with LongCat Image
- you need to edit pictures you upload; LongCat Image only makes new ones here
The specs
| Spec | LongCat Image | Seedream 4.5 |
|---|---|---|
| Price per image | $0.13 | $0.04 |
| 100 images | $13.00 | $4.00 |
| Text-to-image Elo | 856 ±19 (#92 in the arena) | 1026 ±12 (#30 in the arena) |
| Editing Elo | Not scored yet | 1043 ±13 (#38 in the arena) |
| Arena votes | 2,146 | 6,392 |
| Edits uploaded pictures | No | Yes |
| Largest size | — | — |
| Open weights | Yes | No |
| Zero data retention | — | No |
| Lab | Meituan | ByteDance |
| Official name | LongCat Image | Seedream 4.5 |
| Released | December 2025 | December 2025 |
Elo ± is the 95% margin. Prices are for one 1024×1024 image from the Vercel AI Gateway and fal.ai.
Questions
Which is better, LongCat Image or Seedream 4.5?
People picked Seedream 4.5’s picture over LongCat Image’s about 73% of the time in blind votes, and it costs 3.3× less: $0.13 against $0.04 an image.
Which is cheaper, LongCat Image or Seedream 4.5?
Seedream 4.5: $0.04 for a 1024×1024 image, against $0.13 for LongCat Image. 100 images cost $4.00 and $13.00.
Can LongCat Image and Seedream 4.5 edit images?
Seedream 4.5 can change a picture you upload. LongCat Image only makes new pictures from a prompt here.
How can I compare LongCat Image and Seedream 4.5 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.