Try this in the studio
How we tested
- 1
One prompt per test
Each image tests one thing: small printed text, script lettering, mixed scripts, a cut-out, or a wide landscape.
- 2
Seedream 5.5 at 2K, watermark off
All six were made at 2K. An image like these costs 2 credits in the Image studio.
- 3
Checked by hand and by file
We read every word, measured each file's pixel size, and counted the cut-out's transparent pixels.
The six test images
Shown as delivered (resized for the web). The transparent cut-out sits on a checkerboard.
Product shot with a printed label: the large NOIR 05 and the two small lines under it are spelled correctly. 
Transparent PNG cut-out: the bowl and whisk with no background, including the fine whisk tines. 
Poster with a headline, a date line and two small corner blocks of text, all spelled correctly. 
Hand-lettered window sign: "Open late. Stories inside." in script on wet glass. 
Wide 16:9 landscape: a glass greenhouse on a fjord cliff with mist and morning light. 
Bilingual menu: Japanese dish names with small English names and prices under them.
What each test showed
Our own checks on the original files. Not a benchmark: we report only what we measured.
| Test | Original file | Result |
|---|---|---|
| Small printed label (perfume) | 2048 x 2048 pixels (1:1) | "NOIR 05", "EAU DE PARFUM" and "VAPORISATEUR NATURAL SPRAY" all spelled exactly |
| Transparent cut-out (matcha bowl) | 2048 x 2048 pixels (1:1), PNG with alpha | 63.3% fully transparent, 36.4% fully opaque, 0.3% soft edge; whisk tines kept |
| Poster with small text | 1728 x 2304 pixels (3:4) | Title, date line and both small corner blocks spelled exactly |
| Script lettering on glass | 1728 x 2304 pixels (3:4) | "Open late. Stories inside." exact, punctuation included |
| Bilingual menu (Japanese and English) | 1856 x 2320 pixels (4:5) | Dish names, English names and prices readable; one small line at the bottom left garbled |
| Wide landscape | 2560 x 1440 pixels (16:9) | Exactly 16:9, the shape asked for |
Small text
The perfume label has a large name and two small lines; all three are spelled correctly. The poster's title, its date line and the small text in both bottom corners read exactly. The window sign's script lettering, "Open late. Stories inside.", is exact, full stops included.
The bilingual menu is the hardest test: about twenty Japanese dish names, each with a small English name and a price. Nearly all are readable and sensible, but one small line at the bottom left is garbled. That is why we tell you to proofread every line.
Transparent cut-out
The matcha bowl came back as a PNG with an alpha channel. Measured on the original: 63.3% of the pixels are fully transparent, 36.4% fully opaque and 0.3% are soft edge pixels, so the bowl and the fine whisk tines sit on nothing.
Aspect ratio kept
Every file has the shape it was made for: the two square images are 2048 x 2048, the poster and the sign 1728 x 2304 (3:4), the menu 1856 x 2320 (4:5) and the landscape 2560 x 1440 (16:9).
What this is not
Six images are examples, not a benchmark. We did not rate Seedream 5.5 against other models, and we found no published benchmark numbers from the model maker to quote, so this page has no scores.