Seedream 4.5 API
About
Integrate multimodal vision capabilities using Seedream 4.5, designed to process both text and images seamlessly. This model delivers available completely free of charge, open weights architecture. Access Seedream 4.5 via the OpenRouter API with up to 4K output tokens.
Capabilities
Input Modalities
imagetext
Output Modalities
image
Reasoning
No
Structured Output
No
Tool Use
No
WeightsOpen
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
4K
Tokens
Input Limit
4K
Tokens
Max Output
4K
Tokens
Pricing
Standard (per 1M tokens)
Input
Free
Output
Free
Frequently Asked Questions
Seedream 4.5 by OpenRouter costs Free per 1M input tokens and Free per 1M output tokens.
Model Details
ID
bytedance-seed/seedream-4.5
Provider
OpenRouterFamily
seed
Release Date
Dec 23, 2025
Knowledge Cutoff
Jun 1, 2025
API Integration
NPM Package
@openrouter/ai-sdk-provider
Environment Variables
OPENROUTER_API_KEY
API Base URL
https://openrouter.ai/api/v1