Mystery AI model Ox Alpha draws developers with free access

Ox Alpha, a free "stealth model" launched August 20 on OpenRouter, OpenCode, Cline, and Nous Research's portal+, reads ~1M tokens and takes text, image, and video input. A viral 10-task DeepSWE sample hit 80% vs Claude Fable 5's 65% and GPT-5.6 Sol's 52%, but full 113-task runs landed near 63%, roughly level with GPT-5.6 Sol. Speculation points to Zhipu AI's GLM-5.3 family.