Seedream 4.5 model guide
A practical guide to Seedream 4.5 on GPT Image Hub: ByteDance's design-focused image model at 2K and 4K, with clean typography, reference edits, measured render times, and real examples.
Seedream 4.5 is ByteDance's image model with stronger typography and design control than 4.0. On GPT Image Hub it renders 2K and 4K images for 33 credits each; it has no 1K tier because it needs at least about 3.7 megapixels. In the Hub's tests it rendered clean poster text, replaced a headline and background in a reference edit, and produced a 4K product photo in 28 seconds.
Visual examples
Visual examples
An espresso machine in morning light, rendered at 4K in 28 seconds.
4K product photo
An espresso machine in morning light, rendered at 4K in 28 seconds.
Stainless steel espresso machine on dark marble, morning light.Headline and background swap
The CALM SKIN poster restyled to a sunset with the headline GLOW.
Keep the bottle; change the background to sunset and the headline to "GLOW".Same price at 2K and 4K
Check at 2K, export the final at 4K for the same credits.
Render the approved poster again at 4K.Best use cases
- Product posters and ads with short headlines.
- Large product and lifestyle photos at 4K.
- Restyling an existing product shot from a reference.
- Brand visuals that need clean, minimal layouts.
Where to be careful
- 1K drafts; 4.5 starts at 2K (use Seedream 4.0 or 5.0 Pro for 1K).
- Transparent backgrounds, which Seedream does not output.
Strengths
Clean on-image typography for posters and product ads.
Fast large output: a 4K product photo took 28 seconds in testing.
Reliable reference edits that keep the product and change the scene.
One price for 2K and 4K: 33 credits.
Use cases
Product posters
Minimal ads with a short, clean headline.
4K product photography
Large hero images for stores and landing pages.
Scene restyling
Change background, mood, or headline while keeping the product.
Workflow
Render at 2K
Check layout and headline at 2K.
Restyle with a reference
Attach the result and change only the background or text.
Export at 4K
Render the final at 4K for the same 33 credits.
Prompting guidance
- Put the headline in quotes and say where it goes.
- Describe materials and light for product shots.
- For edits, list what stays the same first, then the change.
- Use 4K for print and hero banners; it costs the same as 2K.
Copy-ready prompts
Minimal skincare product poster: a frosted glass serum bottle on a pale sage stone pedestal, soft shadows, small headline text "CALM SKIN" in thin sans-serif at the top, clean studio background.
Cinematic product photo of a stainless steel espresso machine on a dark marble counter, morning light through a window, steam, crisp reflections, no text.
Keep the bottle and pedestal exactly; change the background to a warm sunset gradient and the headline to "GLOW".
Example outputs generated on GPT Image Hub
Official sources
FAQ
Why is there no 1K option for Seedream 4.5?
Seedream 4.5 needs at least about 3.7 megapixels per image, so GPT Image Hub offers 2K and 4K. Smaller aspect-ratio sizes at 2K are scaled up automatically.
How much does Seedream 4.5 cost?
33 credits per image (about $0.033) at 2K or 4K, based on BytePlus's $0.04 list price.
Can Seedream 4.5 edit an existing image?
Yes. In the Hub's test it kept a product and pedestal, swapped the background to a sunset, and replaced the headline in 82 seconds. It accepts up to 10 reference images.
Use this model
Start from a prompt template or compare models first
Use the generator when you already know the model, or compare all supported models when the prompt needs a different balance of speed, detail, and reference inputs.