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AIQuiet 11d · day 11

OpenRouter launches free stealth model "Union Alpha" from anonymous developer

A new frontier-level multimodal AI model appears on OpenRouter with no disclosed maker, offering free access with 256K context and tool calling.

newest coverage 10d agosummary written 10d ago5 pieces2.5k likes & upvotes206 comments Hacker NewsX

What to know

  • Union Alpha's developer is undisclosed; OpenRouter says it only routes requests and is not the owner or provider.
  • The model is offered free of charge during this preview, with 262,144-token context and tool-calling support.
  • Stealth model releases like this are typically used by labs to gather real-world feedback before a named public launch.

OpenRouter AI model routing platformUnion Alpha Anonymous stealth AI model / undisclosed developer

OpenRouter launches free stealth model "Union Alpha" from anonymous developer
x.com

How it unfolded 2 developments, newest first · click a bar or a number to jump posts

Peak 2 pieces in 3h at Sep 16, 9 AM; 5 pieces over 11 days (5 posts) Sep 16, 9 AM — 2 pieces · 2 posts — X 1, Hacker News 1Sep 16, 12 PM — quietSep 16, 3 PM — quietSep 16, 6 PM — quietSep 16, 9 PM — quietSep 17, 12 AM — 2 pieces · 2 posts — Hacker News 2Sep 17, 3 AM — quietSep 17, 6 AM — quietSep 17, 9 AM — quietSep 17, 12 PM — 1 piece · 1 post — Hacker News 1Sep 17, 3 PM — quietSep 17, 6 PM — quietSep 17, 9 PM — quietSep 18, 12 AM — quietSep 18, 3 AM — quietSep 18, 6 AM — quietSep 18, 9 AM — quietSep 18, 12 PM — quietSep 18, 3 PM — quietSep 18, 6 PM — quietSep 18, 9 PM — quietSep 19, 12 AM — quietSep 19, 3 AM — quietSep 19, 6 AM — quietSep 19, 9 AM — quietSep 19, 12 PM — quietSep 19, 3 PM — quietSep 19, 6 PM — quietSep 19, 9 PM — quietSep 20, 12 AM — quietSep 20, 3 AM — quietSep 20, 6 AM — quietSep 20, 9 AM — quietSep 20, 12 PM — quietSep 20, 3 PM — quietSep 20, 6 PM — quietSep 20, 9 PM — quietSep 21, 12 AM — quietSep 21, 3 AM — quietSep 21, 6 AM — quietSep 21, 9 AM — quietSep 21, 12 PM — quietSep 21, 3 PM — quietSep 21, 6 PM — quietSep 21, 9 PM — quietSep 22, 12 AM — quietSep 22, 3 AM — quietSep 22, 6 AM — quietSep 22, 9 AM — quietSep 22, 12 PM — quietSep 22, 3 PM — quietSep 22, 6 PM — quietSep 22, 9 PM — quietSep 23, 12 AM — quietSep 23, 3 AM — quietSep 23, 6 AM — quietSep 23, 9 AM — quietSep 23, 12 PM — quietSep 23, 3 PM — quietSep 23, 6 PM — quietSep 23, 9 PM — quietSep 24, 12 AM — quietSep 24, 3 AM — quietSep 24, 6 AM — quietSep 24, 9 AM — quietSep 24, 12 PM — quietSep 24, 3 PM — quietSep 24, 6 PM — quietSep 24, 9 PM — quietSep 25, 12 AM — quietSep 25, 3 AM — quietSep 25, 6 AM — quietSep 25, 9 AM — quietSep 25, 12 PM — quietSep 25, 3 PM — quietSep 25, 6 PM — quietSep 25, 9 PM — quietYesterday, 12 AM — quietYesterday, 3 AM — quietYesterday, 6 AM — quietYesterday, 9 AM — quietYesterday, 12 PM — quietYesterday, 3 PM — quietYesterday, 6 PM — quietYesterday, 9 PM — quietToday, 12 AM — quietToday, 3 AM — quietToday, 6 AM — quietToday, 9 AM — quietToday, 12 PM — quietToday, 3 PM — quietToday, 6 PM — quiet 1–2
Sep 17Sep 18Sep 19Sep 20Sep 21Sep 22Sep 23Sep 24Sep 25yesterdaynow · 8:59 PM ET
  1. 2

    OpenRouter's model page details Union Alpha's specs and terms

    OpenRouter's listing page for Union Alpha specified it is hosted by a single anonymous third-party provider, has a 262,144-token context window with up to 131,072 completion tokens, supports tool calling and JSON output, and is currently priced at zero for prompt and completion tokens.

    “Union Alpha is a multimodal model built for research, coding, and agentic workflows, while delivering frontier-level performance across a broad range of general-purpose tasks.”
    — OpenRouter, model listing page · source
  2. 1

    OpenRouter unveils stealth model Union Alpha

    OpenRouter posted on X announcing a new stealth model, Union Alpha, described as free to use, multimodal, with 256K context and tool calling, positioned as frontier-level for research, coding, and agentic workflows.

    “🥷 New stealth model: Union Alpha (@unionalphaai) A multimodal model for research, coding, and agentic workflows. - Free to use - 256K context - Tool calling - Frontier-level general-purpose performance…”
    — @OpenRouter

    • 🥷 New stealth model: Union Alpha (@unionalphaai) A multimodal model for research, coding, and agentic workflows. - Free to use - 256K context - Tool calling - Frontier-level general-purpose performance Try it now and share your feedback:

      @OpenRouterX11d ago2.5k▲view on X ↗