Union Alpha: Free Stealth Model on OpenRouter
Melvin Vivas · X post · 2026-09-17 · Open on X
Topics: LLM Fundamentals, Industry Trends & Job Market · Level: beginner
Summary
The creator shares a new free stealth model, Union Alpha, available on OpenRouter. It is described as a multimodal model for research, coding and agentic workflows, with a 256K context window and tool calling.
Key points
- Union Alpha is free to use on OpenRouter as a stealth model.
- It has a 256K context window.
- It supports tool calling, so it works for agentic workflows.
- It is pitched as multimodal, with frontier-level general performance for research and coding.
- Testers are asked to share feedback.
Resources mentioned
- Union Alpha on OpenRouter · tool · openrouter.ai · free
Free multimodal stealth model with 256K context and tool calling, for research, coding and agents. - OpenRouter · tool · openrouter.ai · free
A single OpenAI-compatible API that routes requests to hundreds of models from many providers, with one bill and model fallbacks.
Also in: Customizing Your Coding Setup with Pi Coding Agent Extensions (Melvin Vivas on X · notes), The Jev model is now on OpenRouter (Melvin Vivas on X · notes), Kev-4B model, an alternative to Jev, now available on OpenRouter (Melvin Vivas on X · notes), Space Bunny Alpha: stealth 1M-context flash model on OpenRouter (Melvin Vivas on X · notes) and 42 more
Try this
- Try Union Alpha for free on OpenRouter and share feedback.
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