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 tops DeepSWE coding benchmark in a viral 10-task sample (80% vs Claude Fable 5's 65% and GPT-5.6 Sol's 52%). Full 113-task runs landed near 63%, roughly level with GPT-5.6 Sol. Creator remains anonymous; speculation points to Zhipu AI's GLM-5.3 family.