Ox Alpha Free arrived as a preview model on the opencode.ai Zen gateway and OpenRouter around August 20, 2026, distributed without charge and without any official documentation from its developer. The provider, underlying architecture, and parameter count are all undisclosed, and no benchmark numbers have been published by the creator, making it a deliberately opaque "stealth" release whose origin is still the subject of community speculation. Its identity as an anonymous preview is itself the defining characteristic, since users interact with it as a black-box endpoint rather than a documented model family.

In independent hands-on testing by a third-party benchmarker using a custom harness of sixty tasks followed by sixteen L7 grandmaster problems, the model showed an unusual profile: an average task-completion rate but notably strong code-writing quality that placed it in a higher tier than its general problem-solving numbers would suggest. That combination of middling reasoning breadth with elevated coding capability points to a practical fit for developer-oriented workflows, especially prototyping and code generation, while users should weigh the lack of any official documentation or benchmark disclosure when relying on it for higher-stakes applications.