Providers

Stealth (OpenRouter)

A frontier model that appeared on OpenRouter under a stealth name. ox-alpha has since been confirmed as Z.ai's GLM-5.3-Flash.

openrouter.ai

Models

ox-alpha

Z.ai's GLM-5.3-Flash, first seen as the ox-alpha stealth preview on OpenRouter. In our first benchmark it built a full app fast and on a fraction of the tokens - but with weaker tenant isolation, no tests, and no automatic UI refresh.

We tested it on: 1 Run

View model

Language models: price, performance, and what we measured