Alibaba Qwen tech lead exits after Qwen 3.5 launch
Synopsis
Junyang Lin, a senior technical leader of Alibaba’s Qwen AI team, has stepped down shortly after the launch of the Qwen 3.5 Small Model series. The departure follows the release of Alibaba’s latest lightweight open-weight models. Industry figures described Lin as central to Qwen’s global developer engagement. Alibaba has not issued an official statement clarifying the circumstances of his exit.
Junyang Lin, a senior technical leader of Alibaba’s Qwen AI project, has stepped down one day after the launch of the Qwen 3.5 Small Model series. Lin did not provide reasons for his departure. The move comes amid intensifying global AI competition, with industry figures describing his exit as significant for the open-weight initiative.
Key highlights
- Alibaba introduced Qwen in April 2023 and opened it to public use in September after receiving regulatory approval.
- The newly launched Qwen 3.5 Small Model series includes four variants: 0.8B, 2B, 4B and 9B parameters.
- The company described the systems as native multimodal models suited for on-device deployment and lightweight AI agents.
- Elon Musk commented on X that the models demonstrated “impressive intelligence density.”
- Lin’s departure triggered strong reactions from colleagues and industry partners.
Alibaba saw a key leadership change this week as Junyang Lin, a senior technical leader behind the Alibaba Qwen 3.5 Small Model series, announced he was stepping down from the team just one day after the latest models were unveiled.
Lin shared the update in a post on X, stating he was “stepping down” from the Qwen project but providing no further explanation. Alibaba has not issued an official statement on the matter.
Exit Follows Major Model Release
The departure comes immediately after Alibaba introduced its Qwen 3.5 Small Model series, a set of lightweight, open-weight artificial intelligence models designed for broader deployment. The launch drew attention within the global AI developer community.
According to his LinkedIn profile, Lin joined Alibaba in July 2019 and became part of the Qwen team in April 2023, shortly after the generative AI project was introduced.
Central Figure in Open-Weight AI Push
Alibaba’s Qwen family, launched in April 2023, has become one of China’s most visible open-weight AI initiatives. Open-weight models allow developers to access model parameters for research and customisation, though not necessarily full open-source control.
In benchmark comparisons shared publicly, Qwen models have been positioned alongside systems from OpenAI, Google and Anthropic. The latest 3.5 Small Model series focuses on multimodal capabilities, meaning the systems can process multiple types of data, such as text and images.
Wenting Zhao, a research scientist on the Qwen team, described Lin’s departure as the “close of a chapter” and acknowledged his role in advancing engineering and open development efforts.
Yuchen Jin, chief technology officer of AI infrastructure startup Hyperbolic, said Lin helped connect Qwen with the broader global developer community. Tiezhen Wang, head of APAC ecosystem at Hugging Face, called the exit a significant setback for the initiative.
Uncertainty Around Broader Changes
Separately, Qwen contributor Chen Cheng posted that he was “heartbroken” by the news, suggesting the team had been collaborating on model releases shortly before the announcement. Another team member, Binyuan Hui, updated his X profile to read “formerly MTS @Alibaba_Qwen,” though it remains unclear whether he has formally left the company.
The circumstances surrounding Lin’s departure have not been clarified.
Quick FAQs
Q1. Why did Junyang Lin step down from Alibaba Qwen?
Junyang Lin announced on X that he was stepping down from the Alibaba Qwen project but did not provide a reason. The company has not issued an official statement explaining the circumstances of his departure.
Q2. When did Alibaba launch Qwen 3.5 Small Models?
Alibaba introduced its Qwen 3.5 Small Model series on Monday, a day before Lin announced his exit from the project.
Q3. What are the Qwen 3.5 Small Models?
The Qwen 3.5 Small Model series includes four multimodal models with 0.8B, 2B, 4B, and 9B parameters. Alibaba said the models are designed for on-device AI deployment and lightweight AI agent applications.
Q4. Has anyone else left the Qwen team?
Binyuan Hui updated his X profile to describe himself as “formerly MTS @Alibaba_Qwen,” though it is not confirmed whether he has left the company or when the change occurred.
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Pooja Malik is a business journalist with over six years of experience covering startups, entrepreneurship, and emerging trends. She has previously worked with leading media platforms such as YourStory Media and BW BusinessWorld, where she reported on business, policy, and market developments. Currently, she serves as Editor at The Inspirepreneur Magazine, where she writes and edits stories across business, lifestyle, and travel, with a focus on clarity, accuracy, and reader relevance.
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