Union Alpha — The Free Stealth Model on OpenRouter
unionalpha.site
LaunchIndex first observed Union Alpha — The Free Stealth Model on OpenRouter (unionalpha.site) live on 5 November 2026. View its launch screenshot, category, and verification evidence.
A launch record built from evidence.
Union Alpha — The Free Stealth Model on OpenRouter (unionalpha.site) was first observed live on 5 November 2026.
Union Alpha is an anonymous AI model with a 262K context window, offered as a free preview API for developers, with upcoming pricing. It compares to higher-cost models and emphasizes frontier performance.
Its profile is classified as Developer tool within Technology / Artificial intelligence.
What the launch signal contained.
- First observed live
- Previous state
- No prior non-live observation
- Last verified
- Canonical host
- unionalpha.site
- Category
- Technology / Artificial intelligence
- Website type
- Developer tool
- Observed title
- Union Alpha — The Free Stealth Model on OpenRouter
- Observed description
- Union Alpha is an anonymous model with a 262K context window, free preview access, and a 74.2% SWE-bench score. Everything documented so far, in one place.
- Detected technologies
- None detected
- Screenshot captured
- Evidence source
- Browser observation · Local
- Evidence confidence
- 93%
- HTTP status
- 200
A canonical launch profile for unionalpha.site.
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