# OpenRouter officially revealed Union Alpha as Unbiased’s Pareto

Zhipu

Debunked

OpenRouter’s official page reveals Union Alpha was a stealth model, revealed to be Pareto by Unbiased; the free stealth period has ended. The Zhipu GLM-5.4 / GLM-5.5 claim is overturned.

- Event date: Sep 17, 2026 18:11 Thu · Beijing Time (UTC+8)
- Resolved: Sep 18, 2026 12:00 Fri · Beijing Time (UTC+8)
- Review updated: Sep 18, 2026 07:29 Fri · Beijing Time (UTC+8)

## Sources

- Pareto - API Pricing & Providers: https://openrouter.ai/unbiased/pareto
- SuSu_酥酥👅 \(@NFT_Chen\) on X: https://x.com/NFT_Chen/status/2100286632041804021
- Union Alpha - API Pricing & Providers: https://openrouter.ai/stealth/union-alpha
- Union Alpha 已在 OrcaRouter 上线：免费 256K 隐身模型: https://www.orcarouter.ai/zh-CN/blog/union-alpha-leak
- SuSu_酥酥👅 \(@NFT_Chen\) on X: https://x.com/NFT_Chen/status/2100268885727719577
- SuSu_酥酥👅 \(@NFT_Chen\) on X: https://x.com/NFT_Chen/status/2100407447676678416
- Unbiased AI | Frontier performance for less.: https://unbiased.ai/

Canonical entry: https://www.ailyre.com/source/?id=union-alpha-glm54-2026-09&lang=en