Alibaba’s AI lead quits day after Qwen 3.5 small model launch
Junyang Lin, a central technical leader on Alibaba’s Qwen AI team, stepped down one day after the company launched its Qwen 3.5 Small Model series, which includes four models ranging from 0.8B to 9B parameters. His departure prompted strong reactions from colleagues and partners, raising questions about the future pace of Alibaba’s open-weight AI development.
1. Leadership Change at Qwen Project
Junyang Lin unexpectedly stepped down from his role on the Qwen AI team one day after the launch of Qwen 3.5, without providing reasons. Lin joined Alibaba in July 2019 and became a central figure on the project in April 2023, making his abrupt exit a potential disruption to the team’s continuity.
2. Qwen 3.5 Small Model Series Launch
Alibaba unveiled the Qwen 3.5 Small Model series featuring four configurations—0.8B, 2B, 4B, and 9B parameters—designed for on-device deployment and lightweight AI agents. Early benchmark results have matched those of leading U.S. models, highlighting Alibaba’s advancing position in the global open-weight AI arena.
3. Team Reactions and Future Implications
Colleagues and external partners described Lin’s departure as a significant loss for the project’s engineering and community outreach efforts. Observers warn that the leadership gap could slow future model releases and potentially impact Alibaba’s competitive edge in the rapidly evolving AI landscape.