Text-to-Image Generation
Generates images from natural language prompts with a context window of up to 10,000 tokens for detailed descriptions. Supports output up to 2048×2048 pixels (4 megapixels).
ByteDance
Seedream 4.5
Seedream 4.5 is an image generation and editing model developed by ByteDance, built on a unified architecture that handles both creating images from text prompts and modifying existing images within a single system. It accepts up to 10 reference images in one request, enabling multi-source compositing workflows such as product swaps and element transfers between images while preserving depth, perspective, and lighting consistency. The model supports output resolutions up to 2048×2048 pixels across multiple aspect ratios including 1:1, 16:9, and 9:16. One of Seedream 4.5's most documented characteristics is its text rendering accuracy — it can produce correctly spelled, legible text in various font styles and non-Latin scripts integrated naturally into scenes like signs, packaging, and posters. The model ranks 10th globally on the LM Arena leaderboard with a score of 1147 and was trained through December 2025. It is well suited for designers, marketers, and e-commerce teams who need production-ready visuals driven by natural language prompts, without requiring manual selection tools or layer-based editing workflows.
December 2025
10,000 context
N/A output
Text-to-Image Generation
Image Editing
Multi-Image Composition
Text Rendering in Images
Aspect Ratio Control
High-Resolution Output
Model Overview
High-signal model metadata in a structured two-column overview table.
Provider
The entity that provides this model.
ByteDance
Input Context Window
The number of tokens supported by the input context window.
10,000
tokens
Maximum Output Tokens
The number of tokens that can be generated by the model in a single request.
N/A
tokens
Open Source
Whether the model's code is available for public use.
No
Release Date
When the model was first released.
December 2025
Knowledge Cut-off Date
When the model's knowledge was last updated.
December 2025
API Providers
The providers that offer this model. This is not an exhaustive list.
ByteDance
Modalities
Types of data this model can process.
Image
Text
What is Seedream 4.5
A fuller summary of positioning, capabilities, and source-specific details for Seedream 4.5.
Seedream 4.5 is an image generation and editing model developed by ByteDance, built on a unified architecture that handles both creating images from text prompts and modifying existing images within a single system. It accepts up to 10 reference images in one request, enabling multi-source compositing workflows such as product swaps and element transfers between images while preserving depth, perspective, and lighting consistency. The model supports output resolutions up to 2048×2048 pixels across multiple aspect ratios including 1:1, 16:9, and 9:16.
One of Seedream 4.5's most documented characteristics is its text rendering accuracy — it can produce correctly spelled, legible text in various font styles and non-Latin scripts integrated naturally into scenes like signs, packaging, and posters. The model ranks 10th globally on the LM Arena leaderboard with a score of 1147 and was trained through December 2025. It is well suited for designers, marketers, and e-commerce teams who need production-ready visuals driven by natural language prompts, without requiring manual selection tools or layer-based editing workflows.
Capabilities
What Seedream 4.5 supports
Image Editing
Modifies existing images using natural language instructions without requiring layer masks or manual selection tools. Editing and generation share a single unified architecture.
Multi-Image Composition
Accepts up to 10 source images in a single request via imageUrlArray input, enabling product swaps, element copying, and multi-source compositing while maintaining lighting and perspective consistency.
Text Rendering in Images
Renders legible, correctly spelled text within generated images, including non-Latin scripts and varied font styles integrated into scenes like signs, posters, and packaging.
Aspect Ratio Control
Supports configurable aspect ratios including 1:1, 4:3, 3:4, 2:3, 3:2, 9:16, and 16:9, controlled via numeric parameters in the request.
High-Resolution Output
Produces images at resolutions up to 2048×2048 pixels, delivering 4-megapixel output suitable for print and production use cases.
Pricing for Seedream 4.5
Primary API pricing shown in the same “quick compare” spirit as the reference page.
Input tokens
N/A
Per million tokens
Output tokens
N/A
Per million tokens
API Access & Providers
Places where this model is available, based on the synced detail-page metadata.
ByteDance
Configuration & Parameters
The configurable options currently documented for this model.
Width
NumberHeight
NumberSupported Request Parameters
Parameters currently listed by OpenRouter or the local catalog for this model.
Resources & Documentation
Official model cards, release notes, docs, and other references synced from the source page.
Community discussion
What people think about Seedream 4.5
Seedream 4.5 discussions are most active in r/Freepik_AI, r/HiggsfieldAI, r/generativeAI. Top Reddit threads cluster around benchmark and model-comparison threads, safety and censorship questions.
The strongest match in this snapshot has 367 upvotes and 160 comments.
Title says it. Looking for cheapest way for seedream 4.5.
i'm using seedream and it is not accepting any photo references , i've tried to change that for nano banana and other ai model and it worked fine
It was working like an hour ago. It doesn't work anymore, all my NSFW prompts are being blocked and so are of everyone I know. Is this permanent or are they gonna revert this?
The info tag from Seedream 4 "the new uncensored image from Bytedance" is still in place but no longer applies to the heavily-censored Seedream 4.5, which sadly refuses anything slightly NSFW.
All my NSFW prompts that were working this morning are now blocked.
Edit: Meat is back on the menu, boys! It works again.
FAQ
Common questions about Seedream 4.5
What is the context window for Seedream 4.5?
Seedream 4.5 supports a context window of 10,000 tokens, allowing for detailed and descriptive natural language prompts when generating or editing images.
What is the training data cutoff for Seedream 4.5?
Seedream 4.5 has a training date of December 2025, meaning its knowledge and visual training data extends through that period.
How many images can I reference in a single editing request?
You can reference up to 10 images in a single request using the imageUrlArray input, enabling complex multi-source compositing workflows.
What output resolutions and aspect ratios does Seedream 4.5 support?
The model supports output up to 2048×2048 pixels (4 megapixels) with configurable aspect ratios including 1:1, 4:3, 3:4, 2:3, 3:2, 9:16, and 16:9.
Who publishes Seedream 4.5 and where does it rank on benchmarks?
Seedream 4.5 is published by ByteDance. It ranks 10th globally on the LM Arena leaderboard with a score of 1147 as of its release.
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