MiMo V2.5 Pro

MiMo V2.5 Pro is Xiaomi's flagship open-source model, designed for the most demanding agentic, complex software engineering, and long-horizon workloads. Xiaomi describes it as their most capable release to date, built to sustain complex trajectories across thousands of tool calls while maintaining strong instruction following and coherence over a very large context window. The model is released as open weights, making it accessible for teams that need a self-hostable foundation model without proprietary licensing constraints.

Under the hood, the model uses a Mixture-of-Experts design with 1.02 trillion total parameters and 42 billion active parameters, paired with a hybrid attention architecture that interleaves sliding window and global attention at a roughly 6:1 ratio to keep key-value cache storage compact without sacrificing long-context performance. A three-layer Multi-Token Prediction module, inherited from the earlier MiMo-V2-Flash lineage, helps speed up inference and rollout. Independent reporting notes that the model achieved an Artificial Analysis intelligence index score of 54 and successfully completed an autonomous Peking University compiler-development task over 4.3 hours and 672 tool calls, signaling practical strength for extended, tool-driven coding workflows.