Mystery AI model Ox Alpha draws developers with free access

Ox Alpha, a free 'stealth model' launched Aug 20 on OpenRouter, offers 1M context, multimodal input, and zero data retention. Early viral claims of beating Claude Fable 5 and GPT-5.6 Sol on DeepSWE came from a 10-task sample; full 113-task runs landed near 63%, roughly level with GPT-5.6 Sol. Speculation points to Zhipu AI's GLM-5.3 family.