For the past week, developers have been puzzling over a model called Ox Alpha. It appeared on OpenCode and OpenRouter on August 20 with no owner attached, free to use, with a 1M-token context window and support for image and video input. Independent researchers fingerprinted its tokenizer, ran compression analyses, and traced it to Z.ai's GLM family with high confidence. On August 26, Z.ai confirmed it: Ox Alpha was GLM-5.3-Flash in disguise, tested anonymously to gather real-world feedback befo...