Knowledge Atlas Technology Joint Stock Co., Ltd.[1][a] branded internationally asZ.ai,[2][3] is a Chinese technology company specializing inartificial intelligence (AI). The company was formerly known asZhipu AI outside China until its rebranding in 2025.[4][5][2]
Founded in 2019, the startup company began fromTsinghua University and was later spun out as an independent company.[8][9]
In 2023, it raised 2.5 billion yuan (approx. 350 million in USD) fromAlibaba Group andTencent, along withMeituan,Ant Group,Xiaomi, andHongShan.[10][11][12] In March 2024, Zhipu AI announced it was developing aSora-like technology to achieveartificial general intelligence (AGI).[13] In May 2024, the Saudi Arabian finance firm Prosperity7 Ventures, LLC participated in a USD $400 million financing round for Zhipu AI with a valuation of approximately 3 billion USD.[14] In July 2024, they debuted the Ying text-to-video model.[15]
In October 2024, Zhipu AI released GLM-4.0, an open-sourceend-to-end speech large language model. The model can replicate human-like interactions and has the capability to adjust its tone, emotion, or dialect based from user's preference.[16] In May 2025, the company sealed a 61.28 million yuan deal from the Chinese government for city projects in Hangzhou.[9]
In July 2025, Zhipu AI released GLM-4.5 and GLM-4.5 Air, their next generation language models,[17] and the company rebranded itself as Z.ai internationally.[2][4][5] In August 2025, Z.ai announced that their GLM models are compatible with Huawei's Ascend processors.[5] On August 11, 2025, Z.ai released a new vision-language model (VLM) with a total of 106B parameters, GLM-4.5V.[18][19] In late September 2025, the company released GLM 4.6 using China's domestic chips such as those fromCambricon Technologies.[20][21] That same year, the company had its official name to Knowledge Atlas Technology JSC Ltd.[22][23]
Z.ai provides the following products and services:
GLM (General Language Model, formerly known as ChatGLM): series of pre-trained dialogue models initially developed by Zhipu AI and Tsinghua KEG in 2023.[31] GLM 4.5, released in July 2025 by Z.ai, can run at only eightNVIDIA H20 chips.[32] The release of GLM 4.6 in late September 2025 marked the first integration of FP8 and Int4 quantization onCambricon chips. It also supports native FP8 onMoore Threads GPUs.[20][21]
Ying: Text-to-video model that generates image and text prompts into a six-second video clip for around 30 seconds.[15]
AutoGLM: AI agent application that uses voice commands to complete tasks within a smartphone. The app can analyze complex tasks such as ordering an item from a nearby store and repeating an order based from the user's shopping history.[33]
AMiner: Created byJie Tang (co-founder of Z.ai) in March 2006, now owned by Z.ai.
^"Knowledge Atlas Tech Joint (2513.HK)".Yahoo Finance. Retrieved26 January 2026.The company was formerly known as Beijing Zhipu Huazhang Technology Co., Ltd. Knowledge Atlas Technology Joint Stock Company Limited was incorporated in 2019 and is based in Beijing, China.
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