Union Alpha (free)

union-alpha-free · Stealth

This model was retired on 2026-09-17.
Requests return 404 model_retired. All model retirements

Developed by Stealth, Union Alpha is a multimodal model built for research, coding, and agentic workflows. It delivers frontier-level performance across a broad range of general-purpose tasks. Featuring a massive 262,144 token context window, this model is highly capable of handling extensive and complex tasks.

Specifications

Context262K tokens
Modalitiestext, image

Frequently asked questions

What is Union Alpha (free)?

Developed by Stealth, Union Alpha is a multimodal model built for research, coding, and agentic workflows. It delivers frontier-level performance across a broad range of general-purpose tasks. Featuring a massive 262,144 token context window, this model is highly capable of handling extensive and complex tasks.

What is the context length of Union Alpha (free)?

Union Alpha (free) has a 262,144 token context window.

What modalities does Union Alpha (free) support?

Union Alpha (free) accepts text and image input.

How do I call Union Alpha (free) via API?

Union Alpha (free) is available through the AIHubMix unified API. The API is OpenAI-compatible: point your OpenAI SDK at https://aihubmix.com/v1, use your AIHubMix API key, and set the model name to union-alpha-free — no other code changes needed.

Who created Union Alpha (free)?

Union Alpha (free) is developed by Stealth. AIHubMix aggregates it alongside models from other providers behind one API and one bill.

Browse models available on AIHubMix — one interface for every major LLM.