Mystery Ox Alpha Model Revealed To Be From Chinese Lab Z.AI
Mystery Ox Alpha Model Revealed To Be From Chinese Lab Z.AI
摘要: Mystery Ox Alpha Model Revealed To Be From Chinese Lab Z.AI
August 26, 2026
August 26, 2026
OfficeChai Team
The model that spent the better part o
正文
Mystery Ox Alpha Model Revealed To Be From Chinese Lab Z.AI
August 26, 2026
August 26, 2026
OfficeChai Team
The model that spent the better part of a week confusing developers, benchmark trackers, and half of AI Twitter has a name attached to it now. As per Bloomberg, Ox Alpha, the free “stealth” model that showed up on OpenRouter and OpenCode on August 20 with no company logo anywhere near it, is a new iteration of the GLM series, the flagship release from Chinese lab Z.AI. Z.AI will release the weights of the model tonight, making the model open for anyone to use.
For anyone who missed the last two weeks, Ox Alpha arrived with a listing that told developers everything about what it could do and nothing about who built it. OpenRouter described it as a reasoning model designed for coding, sustained agentic work, and production workloads, and attributed it to “a third-party provider who has chosen to remain anonymous during this preview.” It shipped with a context window just over a million tokens, took text, image, and video as input, and was offered free through both OpenRouter and OpenCode, with OpenCode advertising capacity of 100 trillion tokens a day and Nous Research claiming it could push a quadrillion through its own portal. Within a day of release, developer Ben Davis’s informal 10-task run on the DeepSWE benchmark had Ox Alpha at 80% first-pass accuracy, ahead of Claude Fable 5 at 65% and GPT-5.6 Sol at 52%. That single data point was enough to send the model viral and end DeepSeek’s 56-day streak atop the OpenCode leaderboard.
The identity hunt that followed is where the GLM theory actually took shape, and OfficeChai covered both stages of it as they happened. The first piece,
published as the model appeared
, laid out two competing theories: Xiaomi, whose MiMo team had run an identical stealth-launch playbook with MiMo-V2-Pro under the alias Hunter Alpha, and Z.ai, formerly Zhipu AI, based on a tokenizer fingerprinting test that a developer going