Not open source. Even if we accept model weights as source code, which is highly dubious, this clearly violates clauses 5 and 6 of the Open Source Definition. It discriminates between users (clause 5) by refusing to grant any rights to users in the European Union, and it discriminates between uses (clause 6) by requiring agreement to an Acceptable Use Policy.
EDIT: The HN title was changed, which previously made the claim. But as HN user swyx pointed out, Tencent is also claiming this is open source, e.g.: "The currently unveiled Hunyuan-Large (Hunyuan-MoE-A52B) model is the largest open-source Transformer-based MoE model in the industry".
EDIT: The HN title was changed, which previously made the claim. But as HN user swyx pointed out, Tencent is also claiming this is open source, e.g.: "The currently unveiled Hunyuan-Large (Hunyuan-MoE-A52B) model is the largest open-source Transformer-based MoE model in the industry".