Z.ai

Z.ai, formerly known internationally as Zhipu AI, is a Beijing-based Chinese artificial-intelligence company focused on large language models and related generative-AI products. Its Chinese corporate name is Beijing Zhipu Huazhang Technology Co., Ltd., while its international brand changed to Z.ai in 2025. The company developed from research activity associated with Tsinghua University and became an independent startup in 2019. Its work is closely connected with the General Language Model, or GLM, research program, which was developed by researchers at Tsinghua's Knowledge Engineering Group and Zhipu AI. The GLM family is the company's central technology platform. Early GLM research used an autoregressive blank-infilling approach, in which sections of text are removed and the model learns to reconstruct them while also supporting conventional language generation. The resulting model family has included conversational systems, general-purpose language models, vision-language models, speech systems, and text-to-video technology. Products and services have been aimed at individual users, developers, enterprises, public-sector customers, and research communities. Z.ai expanded rapidly during China's generative-AI investment cycle. In 2023, it reportedly received financing from a group that included Alibaba Group, Tencent, Meituan, Ant Group, Xiaomi, and HongShan. Prosperity7 Ventures participated in a further financing round announced in 2024. The company has been described by industry analysts and investors as one of China's leading so-called AI tiger companies and as a significant participant in the Chinese large-language-model market. Its product portfolio includes the GLM model series, the Ying text-to-video system, AutoGLM smartphone-agent software, and AMiner, a scholarly and research-information database created by Jie Tang and later owned by Z.ai. The company has also pursued international distribution and infrastructure compatibility, including work involving Huawei Ascend processors and overseas offices or innovation projects. Z.ai's international position has been shaped by both technological competition and geopolitical restrictions. In January 2025, the United States Commerce Department added the company to the Entity List, citing national-security concerns. In 2025, Z.ai began releasing selected GLM models under the MIT License, emphasizing open weights and wider developer access. It also continued model upgrades, including GLM-4.5, GLM-4.6, GLM-4.7, and the GLM-5 generation. The company completed an initial public offering on the Hong Kong Stock Exchange on 8 January 2026, becoming one of the first major Chinese large-language-model companies to reach the public markets. Later in 2026, it released GLM-5 and successive updates, while facing reported compute shortages, user-access restrictions, pricing changes, and competition from leading United States model providers. Z.ai therefore combines a research-oriented origin with a commercial strategy spanning foundation models, APIs, applications, open-weight releases, enterprise services, and international expansion. Z.ai is a Chinese artificial-intelligence company whose principal business is the research, development, and commercialization of large language models. The company was founded in 2019 by researchers connected with Tsinghua University and initially operated under the Zhipu AI name. Its international brand changed to Z.ai in 2025. The company’s domestic legal identity has been reported as Beijing Zhipu Huazhang Technology Co., Ltd., while its listed corporate name is Z.AI Co., Ltd. The company’s central technology family is GLM, short for General Language Model. The research behind GLM was developed with Tsinghua’s Knowledge Engineering Group and was described in a 2022 Association for Computational Linguistics paper. The approach uses an autoregressive blank-infilling method: portions of text are removed and the model learns to reconstruct them while also handling conventional language-generation tasks. The resulting product line, initially associated with ChatGLM, expanded into increasingly capable general-purpose language models, voice systems, vision-language models, and software agents. Z.ai has positioned itself as one of China’s leading domestic alternatives to US-developed foundation-model providers. Investors and industry observers have grouped it among China’s major AI “tiger” companies, and the International Data Corporation has described it as one of the country’s largest large-language-model participants. Its commercial activities include model access through APIs and subscriptions, enterprise AI deployments, open-weight model releases, research tools, and government or city-level projects. The company also owns AMiner, a scholarly and research-information database founded by Jie Tang in 2006. Capital raised from major Chinese technology and internet companies helped fund the company’s expansion. Reported investors have included Alibaba Group, Tencent, Meituan, Ant Group, Xiaomi, and HongShan. In 2024, Prosperity7 Ventures participated in a financing round reported at approximately US$400 million, with a valuation of about US$3 billion. In 2025, the company disclosed preparations for a public offering and completed a reported 61.28 million yuan government contract connected with city projects in Hangzhou. Z.ai’s model strategy has increasingly emphasized open weights. In July 2025, the GLM-4.5 and GLM-4.5 Air models were released under the MIT License, followed by subsequent GLM releases and vision-language systems. The company has worked to make its models compatible with Chinese computing infrastructure, including Huawei Ascend processors and chips from Cambricon Technologies and Moore Threads. Its broader product portfolio includes Ying, a text-to-video model, AutoGLM, a voice-operated mobile agent, and GLM-4-Voice, an end-to-end speech model capable of adjusting tone and dialect. The company entered the public markets in January 2026 through an initial public offering on the Hong Kong Stock Exchange, described in the reference material as the first IPO by a major Chinese LLM company. Later in 2026 it released GLM-5, GLM-5.1, GLM-5.2, and GLM-5.3, with reported improvements in context length, post-training, coding capability, and support for domestic chips. At the same time, Z.ai faced operational pressure when a shortage of computing resources caused service complaints, restricted new registrations, and contributed to a reported fall in its share price. It subsequently raised API prices while maintaining a lower reference price than Anthropic’s cited Opus 4.6 model. The company therefore combines an open-model research identity with the infrastructure, pricing, and capacity challenges typical of a rapidly scaling AI platform.

Z.ai originated in research associated with Tsinghua University and became an independent company in 2019. Its technical foundation is the GLM family, developed through collaboration involving Zhipu AI and Tsinghua's Knowledge Engineering Group. A 2022 academic publication described GLM's autoregressive blank-infilling method, which combines text reconstruction with language generation. The company entered a period of rapid expansion in 2023. It raised substantial financing from major Chinese technology and consumer-platform investors, while its models became part of the competition to establish domestic alternatives to leading United States AI systems. In 2024, Zhipu announced work on Sora-like video-generation technology, released the Ying text-to-video model, launched GLM-4-Plus, and introduced GLM-4-Voice, an end-to-end speech model capable of varying tone and dialect. In 2025, the company prepared for a public offering and began releasing selected models under the MIT License. It also won a Chinese government-related city-project contract in Hangzhou. During the same year, it released GLM-4.5, GLM-4.5 Air, GLM-4.5V, GLM-4.6, and later GLM-4.6V and GLM-4.7. The company adopted Z.ai as its international brand and worked to make its models compatible with domestic Chinese processors, including Huawei Ascend and chips from Cambricon Technologies. Its international activities expanded to offices and innovation projects in several overseas markets. The company faced geopolitical pressure when the United States Commerce Department placed it on the Entity List in January 2025. Despite this restriction, Z.ai continued model development and international positioning around open-weight systems. It also owned AMiner, a scholarly research database founded by Jie Tang in 2006. On 8 January 2026, Z.ai completed an initial public offering on the Hong Kong Stock Exchange. It subsequently released GLM-5 and later GLM-5.1, GLM-5.2, and GLM-5.3. The 2026 product cycle included open-source releases, larger context windows, improved coding performance, and changes to API pricing. The company also encountered compute shortages that affected access and prompted restrictions on new registrations. These developments illustrate Z.ai's evolution from a university-linked language-model startup into a publicly traded AI company with research, infrastructure, application, and international ambitions.

1. 2026Hong Kong listing

   Z.ai began trading on the Hong Kong Stock Exchange on 8 January.

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2. 2025International rebrand and open-weight releases

   The company adopted Z.ai internationally and released selected GLM models under the MIT License.

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3. 2024Expansion into video and speech generation

   The company announced Sora-like development work, released Ying, launched GLM-4-Plus, and introduced GLM-4-Voice.

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4. 2023Major strategic financing

   Zhipu AI raised financing involving Alibaba Group, Tencent, Meituan, Ant Group, Xiaomi, and HongShan.

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5. 2022GLM training method published

   Researchers presented the General Language Model training approach using autoregressive blank infilling.

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6. 2019Company founded

   The startup emerged from research associated with Tsinghua University and was established as an independent company.

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Chinese AI technology company positioned around large language models, multimodal generative AI, open-weight model releases, developer infrastructure, and enterprise applications.

• GLMLarge language model family2023

  GLM, short for General Language Model and previously associated with ChatGLM, is Z.ai's principal family of pretrained and conversational language models. The series has expanded from dialogue systems into general-purpose, multimodal, speech, and coding-oriented models. Later releases include GLM-4.5, GLM-4.6, GLM-4.7, GLM-5, GLM-5.1, GLM-5.2, and GLM-5.3. Selected models were released with open weights under the MIT License.

• YingText-to-video model2024

  Ying is a generative video system that converts textual or image-based prompts into short video clips. Its introduction marked Z.ai's expansion beyond text generation into audiovisual creation and Sora-style video research.

• AutoGLMAI agent

  AutoGLM is an agent application designed to execute smartphone tasks from voice commands. It can interpret multi-step requests, interact with mobile services, and support activities such as ordering products or repeating purchases based on shopping history.

• AMinerResearch-information database2006

  AMiner is a scholarly and research-information database founded by Jie Tang in 2006. It provides structured information about academic publications, researchers, and research networks and is now owned by Z.ai.

• 2026Restricted new user registrations during compute shortageOther

  A shortage of computing resources reportedly caused service pressure and user complaints.

  What changed. Z.ai issued a public request for support and restricted new user signups.

  Aftermath. The incident was accompanied by a reported decline in the company's share price.

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• 2026Increased API pricesPrice change

  The company was expanding the GLM-5.1 platform while competing with premium United States model providers.

  What changed. Z.ai increased API prices by 10% while maintaining a lower price than Anthropic's cited Opus 4.6 model.

  Aftermath. The announcement coincided with a reported rise in the company's share price.

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• 2025Adopted Z.ai as the international brandStrategy

  The company had previously been known internationally as Zhipu AI while developing a global presence.

  What changed. It rebranded its international operations and model ecosystem under the Z.ai name.

  Aftermath. The new identity was used alongside the company's Chinese corporate name and its GLM product family.

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• 2025Released selected GLM models under the MIT LicenseStrategy

  Z.ai was competing for developers and users in a market dominated by both proprietary and openly released foundation models.

  What changed. The company made selected models available under the permissive MIT License.

  Aftermath. The move strengthened Z.ai's open-weight positioning and broadened potential use by developers and enterprises.

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• 2026Z.ai completes Hong Kong initial public offering

  Z.ai began trading on the Hong Kong Stock Exchange on 8 January 2026, becoming an early major Chinese LLM company to reach public markets.

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• 2026Z.ai faces compute shortages and restricts new registrations

  Reported shortages of computing capacity led to user complaints, a public request for support, and restrictions on new user signups.

  Other
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• 2026Z.ai releases GLM-5.1 and changes API pricing

  GLM-5.1 was first made available to subscribers and subsequently released under an open-source license; the company also raised API prices.

  Product launchPricing
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• 2026Z.ai releases GLM-5.2 and GLM-5.3

  Successive GLM-5 updates expanded context capacity and improved post-training performance, particularly for coding tasks.

  Product generationProduct launch
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• 2025United States adds Zhipu AI to Entity List

  The United States Commerce Department added the company to its Entity List, citing national-security concerns.

  Regulation
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• 2025Z.ai releases GLM-4.5 and GLM-4.5 Air

  The company introduced the next generation of its GLM language-model family and adopted the Z.ai brand internationally.

  Product launchProduct generation
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• 2025Z.ai releases GLM-4.5V vision-language model

  Z.ai introduced a large vision-language model in the GLM-4.5 series.

  Product launchProduct generation
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1. Z.ai
2. Zhipu AI official website