Seedream v4.5 –
Best value for ad images

Seedream v4.5 is an AI image generation model from ByteDance, the company behind TikTok. Unlike Google's Nano Banana models which are general-purpose, Seedream was built from the ground up for one use case: commercial and e-commerce creative production.

With a 9.0/10 cost efficiency score and flat pricing regardless of resolution, it is the cheapest image model in our benchmarks. But cheap does not mean low quality — it scored 7.8 avg quality with particular strength in composition (8.5) and text rendering (8.0). Product photos, promotional graphics, and marketing visuals come out with the kind of polish you would expect from a purpose-built commercial tool.

The standout feature is multi-image composition: you can upload up to 14 reference images to maintain consistent style, character identity, and brand elements across generated outputs. This is critical for ad campaigns that need a cohesive visual identity — something no other image model handles natively.

Seedream's advantage is the combination of low cost and commercial-grade quality. Here is where that combination creates the most value — and where other models are a better fit.

E-commerce product photography: This is Seedream's home turf. Product shots on clean backgrounds, lifestyle product scenes, 360-degree product views, and packaging visuals all benefit from the model's commercial optimization. Materials, lighting, and reflections look accurate — glass refracts, metal reflects, fabric drapes naturally.

Marketing banners and promotional graphics: Sale announcements, seasonal promotions, and event graphics with text overlays leverage Seedream's 8.0 text rendering and 8.5 composition scores. The model handles multi-element layouts well — product image, headline, price callout, and CTA can coexist in a balanced composition.

Campaign-scale production: When you need 50+ creatives that all look like they belong to the same campaign, Seedream's multi-image reference feature keeps visual identity consistent. Upload your brand assets, product shots, and style references, then generate variations that maintain the same look across your entire ad set.

Where to use other models: Ads with prominent human faces — Seedream's 7.0 human realism is the lowest of the three image models. Use Nano Banana Pro (8.5) for people-heavy content. When you need the absolute fastest turnaround, Nano Banana 2 generates in 2-6 seconds vs Seedream's 8-14.

1. Use reference images for every campaign. Seedream's multi-image fusion is its killer feature. Upload product photos, brand colors, and style references before generating. The consistency improvement across your ad set is dramatic compared to text-only prompts.
2. Describe materials and surfaces for product shots. Seedream renders materials accurately when you specify them: “frosted glass bottle,” “matte aluminum lid,” “woven cotton fabric.” The model was optimized for commercial products — lean into that strength.
3. Avoid prominent human faces. Seedream's 7.0 human realism is its weakest metric. Keep people in supporting roles (hands holding a product, silhouettes, distant figures) rather than close-up portraits. If your ad needs a face front-and-center, switch to Nano Banana Pro.
4. Use straight text, not curved. Text rendering scores 8.5 for straight, well-spaced text — headlines, prices, and CTAs come out clean. But curved or circular text fails frequently. Keep text layouts simple and straight for reliable results.
5. Generate at max resolution — it is free. Seedream's flat pricing means there is no cost penalty for higher resolution. Always generate at maximum quality. You can downscale for social media but cannot upscale if you generated too small.
6. Batch-generate campaign variations. Use the same reference images with slight prompt variations to generate 10-20 related creatives for a single campaign. Seedream's style consistency means they will all look cohesive, giving your ad platform more creative options to optimize against.