Seedream 4.5 AI Image Generator

Where many models treat 4K as an upscale afterthought, Seedream 4.5 generates at genuinely large pixel dimensions — a square frame comes out at 4096 × 4096, a 9:16 frame at 3040 × 5504. That extra detail shows in the places e-commerce buyers zoom into: stitching, fabric weave, metal finish, label edges.

Its second signature is reference-faithful editing. Feed it a photo of your handbag or serum bottle and ask for a new set, new lighting or a seasonal theme, and it keeps the object recognisably yours instead of inventing a lookalike. Combined with strong text rendering, that makes it a natural fit for catalogue refreshes, marketplace listings and ad creatives that carry copy. If Seedream 5 Pro is ByteDance's lighting-and-art-direction specialist, 4.5 is the high-resolution production workhorse.

• True 2K and 4K generation — large native pixel sizes for zoomable product detail.
• Accurate in-image text — brand names, prices, taglines and labels.
• Reference editing — restyle or rebuild a scene while preserving the product.
• Multi-image consistency — a series that keeps the same product across shots.
• Fashion and material detail — textiles, leather grain and jewellery sparkle.
• Wide range of frame shapes — from 2:3 portrait to 16:9 and 9:16.

Item	Seedream 4.5
Developer	ByteDance (Seed team)
Output	Up to 4K (e.g. 1:1 = 2048² at 2K, 4096² at 4K)
4K examples	3:4 = 3520 × 4704 · 9:16 = 3040 × 5504 · 3:2 = 4992 × 3328
Modes	Text-to-image, image-to-image, reference editing
Model reference ceiling	Up to 14 images (Cinel: 3, or up to 8 for members)
Text rendering	Strong, suited to ads and packaging
Cinel cost	From 15 credits

1. Select Seedream 4.5 from the image models.
2. Upload a clean product photo — front-facing, even light, no heavy shadows — as your reference.
3. Describe the new scene and the copy separately: "on a marble counter with morning light; headline on the left reads 'Spring Edit'".
4. Pick the frame for the channel: 1:1 for marketplaces, 3:4 or 4:5 for social, 16:9 for site banners.
5. Generate, zoom to 100% to inspect label edges and text, then refine lighting or props with a short follow-up instruction.

• For packaging and ad layouts, specify the text, font mood and placement together — "brand name in clean sans-serif centered on the label" — to make use of its strong typography.
• When editing from references, state what must be preserved (logo, product shape, label colors) before describing the new scene.
• Pick the aspect ratio for the destination first: 3:4 for product listings, 9:16 for story ads, 3:2 for web headers. At 4K these give very large canvases suitable for print.
• Use several references for one product photographed from different angles; this helps the model understand its 3D form.
• Describe the lighting setup in photographic terms (softbox from the left, rim light, seamless white backdrop) for a studio look.

• Marketplace listings — consistent hero shots for Amazon, Shopify, Tmall or Taobao.
• Seasonal catalogue refresh — the same products restaged for holidays or launches.
• Fashion detail images — close-ups that show fabric, seams and hardware.
• Ad creatives with copy — sale banners and promo cards with the headline rendered in.
• Packaging concepts — label and box designs previewed on a realistic product.
• Lookbooks — series of images where every frame keeps the same garment.

Seedream 5 Pro (from 22 credits) focuses on premium studio lighting and multi-reference art direction at 1.5K/2K; choose it for mood and polish, and choose 4.5 when the job demands 4K pixels and catalogue-grade product fidelity. Nano Banana 2 (from 6 credits) is faster and cheaper for composites with several people, but Seedream 4.5 is the stronger option when copy accuracy and product detail at 4K carry the sale.