LongCat 2.0: Open Mixture-of-Experts Model with 1.6T Parameters

benjiro29 released LongCat 2.0, a large open-source language model using a mixture-of-experts architecture with 1.6 trillion total parameters but only 48 billion active during inference. For indie builders, this means cheaper inference costs than dense models of similar capability, with the full model weight available for self-hosting and fine-tuning.