MiMo V2.5 Pro

For post-training, MiMo-V2.5-Pro adopts the three-stage post-training paradigm introduced in MiMo-V2-Flash to achieve exceptional performance. The paradigm begins with Supervised Fine-Tuning (SFT) to build strong, foundational instruction-following skills using curated data pairs. Next, in the Domain-Specialized Training stage, diverse teacher models — ranging from math and safety to complex agentic tool-use — are individually optimized using domain-specific RL rewards. Finally, the process culminates in Multi-Teacher On-Policy Distillation (MOPD). Through dynamic on-policy RL, the single student model iteratively learns from its own outputs, continuously receiving precise token-level guidance from the expert teachers to seamlessly integrate broad capabilities.

• Tool Use