Seedream 4.5: Photorealistic AI Images in Any Aspect Ratio
Seedream 4.5 is an AI image generator built for photorealism: skin, fabric, light and reflections read as a real photograph rather than digital art. Eight aspect ratios up to ultrawide 21:9 and quality up to 4K cover nearly every placement, from vertical stories to a full-width site banner. It runs in the browser and keeps every result in your history.
Photorealism as the Core Skill
This model targets frames you could mistake for photos: portraits with natural skin instead of plastic gloss, product shots with honest highlights on glass and metal, landscapes with believable light. Where many generators betray themselves with a cartoonish sheen, Seedream 4.5 holds the realism line.
It rewards prompts written in a photographer's language. Name the light — soft morning, harsh noon, warm sunset — and add depth of field and camera position. A window-lit portrait with side light and a blurred background will come out far more alive than a request for simply a beautiful portrait.
Eight Aspect Ratios Including Ultrawide 21:9
The lineup spans square 1:1, classic 4:3 and 3:4, screen-native 16:9 and 9:16, photographic 2:3 and 3:2, plus a rarity among image models — ultrawide 21:9. That range lets you generate straight into the target placement instead of cropping a finished frame and losing composition.
The 21:9 format unlocks its own use cases: website hero sections, panoramic banners, landing page headers and cinematic frames with breathing room at the edges. Vertical 9:16 and 2:3 belong to stories and product cards. Aspect ratio and quality are independent controls — changing one never touches the other.
2K and 4K at the Same Cost
The quality switch offers basic 2K and high 4K, and the token charge is identical — which is why 4K is the default. For screens and social feeds 2K is plenty, but since there is no surcharge, dropping quality only makes sense when you are chasing speed.
4K pays off whenever the image faces print, a large display or cropping: a detailed frame survives having a fragment cut out without visible softness. Download results from your generation history at full size — the prompt is stored there too, ready to rerun with tweaks.
Your Photos as the Starting Point
Up to ten references of 10 MB each are accepted. Upload a product shot and get it placed in a new environment with its shape intact. Upload several angles or style examples and the model weighs them together while following your written brief.
This is a working tool for product cards when you need a consistent series without a studio, and for previewing ideas: how a sofa sits in a different interior, how packaging reads on a shelf. References combined with a photorealistic engine produce output that stands comfortably next to a real shoot.
Typical Jobs and Beginner Advice
People reach for this model when credibility matters: avatars and portraits, food shots for menus, interior visualizations, banners featuring people. Hand-drawn illustration styles are not its lane — other models in the catalog handle stylization better, while this one owns the true-to-life look.
Start with a short prompt to see the model's instincts, then add conditions one at a time: light, angle, textures. Avoid cramming ten objects into a frame — photorealism favors simple compositions with a single subject. A miss is cheaper to reword than to regenerate endlessly with the same text.
Häufige Fragen
Is the output good enough for print?
Yes — pick 4K quality, which is the default and costs no more than basic. The detail holds up for reasonably sized print work and large banners. Download the file at full size from your generation history rather than from a compressed preview.
How many reference images can I use?
Up to ten, each up to 10 MB. Provide several angles of one object for accurate shape, or mix style and environment examples. Spell out in the prompt what to take from each photo to keep the blend predictable.
Which format fits stories, and which fits a site header?
Use vertical 9:16 for stories and 2:3 or 3:4 for product cards. For site headers and panoramic banners there is ultrawide 21:9 — a format few image models offer. Aspect ratio is set separately from quality.