Meituan open-sources LongCat-2.5 model: 1.6 trillion total parameters, supports one million context

Meituan has officially open-sourced LongCat-2.5 under the MIT license, supporting commercial inference deployment and further training without additional authorization. LongCat-2.5 is a native multimodal model designed for long-horizon agentic tasks, with notable improvements in end-to-end delivery capabilities across complex codebase development, full project construction, Visual Coding, and professional office scenarios. The model has 1.6 trillion total parameters, activates approximately 48 billion parameters per token, and supports a one-million-token context. For domestic AI computing chips constrained by memory and bandwidth, deep collaborative optimization has also been carried out in model architecture, chip adaptation, and deployment strategy.