Qwen3.8: Alibaba's 2.4T Parameter Open Model Challenges Kimi K3

Alibaba's Qwen team is teasing the release of Qwen3.8, an open model with 2.4 trillion parameters. They claim it is one of the most powerful models available. A preview build is already live for testers. Here's the thing: while 2.4 trillion parameters sounds massive, the total parameter count isn't the same as usable compute. Previous Qwen models use a "mixture-of-experts" design, meaning only a fraction of their parameters are active at any given time. Alibaba has not yet revealed Qwen3.8's activated parameter count, license terms, or weight files. This means its actual running cost is unknown. What's interesting is that Qwen3.8 is appearing just as Moonshot AI is set to release its own 2.8 trillion parameter open-weight model, Kimi K3. This suggests Alibaba is trying to reclaim its position in the open model space. The bottom line is that the true impact of Qwen3.8 depends on its practical usability for developers.