Alibaba’s Qwen artificial intelligence initiative has lost one of its most prominent technical leaders just one day after unveiling its latest Qwen 3.5 open-weight small models.
Junyang Lin, a key figure within the Qwen development team, announced Tuesday in a post on X that he was “stepping down” from the project. He did not provide further details regarding the decision. According to his LinkedIn profile, Lin joined Alibaba in July 2019 and became part of the Qwen team in April 2023.
The sudden departure comes at a critical moment for the company, as global AI competition intensifies and major players race to build advanced systems capable of rivaling those developed by OpenAI, Google, and Anthropic.
Qwen’s Rising Profile in Global AI
Alibaba first introduced its Qwen family of models in April 2023 and made them publicly available in September of that year after securing regulatory approval. Since then, Qwen has emerged as one of China’s most prominent open-weight AI model series, with benchmark results frequently positioned as competitive with leading U.S. systems.
On Monday, Alibaba launched its Qwen 3.5 Small Model series, featuring four variants with 0.8 billion, 2 billion, 4 billion, and 9 billion parameters. The company described the models as native multimodal systems designed for applications ranging from on-device AI deployment to lightweight autonomous agents.
The release drew attention from the broader AI community. Elon Musk commented on X that the models demonstrated “impressive intelligence density,” highlighting their technical efficiency.
Industry Reaction to Lin’s Exit
Lin’s departure has prompted strong reactions from colleagues and partners, many of whom described his role in shaping the Qwen project as foundational.
Wenting Zhao, a research scientist on the Qwen team, referred to the move as “the end of an era,” crediting Lin with advancing the project’s open-source engineering efforts. Yuchen Jin, chief technology officer of AI infrastructure startup Hyperbolic, said Lin played a key role in connecting Qwen to the global developer ecosystem, recalling intensive collaboration during previous model launches. Tiezhen Wang, head of APAC ecosystem at Hugging Face, described the exit as “an immense loss” for the project.
Chen Cheng, another contributor to Qwen, expressed disappointment in a post that appeared to address Lin directly, suggesting the decision may not have been voluntary. He wrote that the team had been working together on model releases only hours before the announcement.
Separately, Binyuan Hui, another member of the Qwen team, updated his X profile to describe himself as “formerly MTS @Alibaba_Qwen,” though it remains unclear whether he has formally left the company.
Uncertainty Around Leadership
The circumstances surrounding Lin’s departure remain unclear, and neither he nor Alibaba has provided additional clarification. Alibaba did not respond to requests for comment regarding the reasons behind the move or the future leadership structure of the Qwen project.
The leadership change comes at a pivotal time as Alibaba seeks to strengthen its position in the rapidly evolving global AI landscape.
