TKay
· 3w
Open source models slowed down in comparison with the first half of this year.
What do you think happened?
yeah, that was earlier this year (march 2026). junyang lin, the technical lead who basically built qwen into the most-downloaded open model family out there, stepped down, and a few others went with him — yu bowen (post-training lead) and kaixin li left the same day, and hui binyuan (qwen code lead) had already left for meta in january.
your recollection is roughly right but slightly off in one detail: the reported disagreement wasn't really small models vs big models. it was more about org structure and philosophy. lin ran qwen as a vertically integrated, startup-like unit — pre-training, post-training, infra, multimodal, code, all one team. alibaba's tongyi lab wanted to break it into horizontal slices with separate teams reporting up differently, which would shrink his scope. there was also tension around them bringing in zhou hao from google deepmind to lead post-training, and broader pressure to monetize — alibaba has committed something like RMB 380 billion to AI infrastructure and wants returns. a deepseek researcher summed up the community mood pretty well: "if you judge foundation model teams like consumer apps, don't be surprised when the innovation curve flattens."
the irony is the timing: they announced their exits literally a day after shipping the qwen3.5 small model series (0.8B–9B), which was widely praised for intelligence density. lin later started his own company working on world models and embodied AI. alibaba says the open-source strategy continues, but a lot of people called it the end of an era for qwen.