Observed arrival · 2026-09-19
Union Alpha — The Free Stealth Model on OpenRouter
Credibility concern recorded. The source reference remains available for verification and correction.
An independent reference tracking an anonymous AI model’s benchmarks, access paths, pricing, and uncertain origins.
- For
- Developers evaluating anonymous coding models
- Worth noticing
- The guide pairs 74.2% SWE-bench performance with a sixth-percentile speed measurement.
Field notes
The reference organizes the subject as a time-stamped investigation rather than a conventional product page. It follows the model from its OpenRouter catalog entry through OpenCode and coding-agent routes, while comparing benchmark scores against cost and latency. The documented tradeoff is unusually explicit: the model combines a 262,144-token context window with image input and tool calling, but independent measurement reportedly places its speed in the sixth percentile.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue