“Ox Alpha,” an anonymous “stealth” model that appeared on OpenRouter earlier today (August 20, 2026).

It’s a reasoning model positioned for coding, sustained agentic work, and production use, with a 1,048,576-token context window, a 131,072-token output cap, and text/image/video input — listed as stealth/ox-alpha on OpenRouter. It’s free during this preview window, with the operator claiming near-unlimited rate limits and 100 trillion tokens/day of serving capacity.

There is some buzz on Twitter that it is frontier or even better at coding.