Union Alpha API
About
Integrate multimodal vision capabilities using Union Alpha, designed to process both text and images seamlessly. This model delivers available completely free of charge, native tool calling support. Access Union Alpha via the OpenRouter API with up to 131K output tokens.
Capabilities
Input Modalities
textimage
Output Modalities
text
Reasoning
No
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Supported
Limits
Context Window
262K
Tokens
Input Limit
262K
Tokens
Max Output
131K
Tokens
Pricing
Standard (per 1M tokens)
Input
Free
Output
Free
Frequently Asked Questions
Union Alpha by OpenRouter costs Free per 1M input tokens and Free per 1M output tokens.
Model Details
API Integration
NPM Package
@openrouter/ai-sdk-provider
Environment Variables
OPENROUTER_API_KEY
API Base URL
https://openrouter.ai/api/v1