Strengths
What it's the best tool for
- Native 4K 4096×4096
- SOTA text and fonts
- Up to 14 reference images
- Unified generate/edit flow
- Cinematic quality
Limitations
When to reach for something else
- Chinese-policy content filters
- 4K renders take 15–30s
- NSFW limits
- No video flow
Sample output
How Seedream 4.5 responds
Prompt
Sushi restaurant ad poster: premium statement, Japanese calligraphy with English translation, palette #111827 #F5D0A9, 4K.
BY
Seedream 4.5
Where teams use it
Four scenarios where it pays for itself
01
Marketplace pack shots
4K premium
02
Localised creatives
Multilingual text
03
Ad posters
Cinematic
04
Photo remixes
14 reference images
About model
More about Seedream 4.5
Seedream 4.5 — ByteDance's 4K Image Model
Seedream 4.5 (ByteDance, December 2025) ships native 4K output, up to 14 reference images and SOTA long-text rendering. Hosted on NetRoom.
What stands out
Unified generate/edit pipeline with natural-language edits, multilingual in-image text, cinematic quality and solid spatial reasoning.
Who it is for
SMM teams, marketplace sellers, designers — anyone who needs 4K without subscriptions or VPN.
Use Seedream 4.5 via the API
The same engine, straight from your code: one key and one balance for text, images, video and sound. Pay only for the requests you make.
curl
curl https://netroom.ai/api/v1/generations \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "bytedance/seedream-45", "input": {"prompt": "A cinematic mountain sunrise"}}'The model id is already in the example. The full parameter reference and prices live in GET /api/v1/models and in the docs.
Try Seedream 4.5
right now
Free access to basic models. No card, no obligations.