MiniCPM-o is an open-source omnimodal large language model from OpenBMB, designed to run on-device with Gemini 2.5 Flash-level performance. Built on 8B parameters with SigLip-400M, Whisper-medium-300M, ChatTTS-200M, and Qwen2.5-7B components, it supports full-duplex multimodal live streaming, real-time vision, speech, and video understanding. It achieves 70.2 on OpenCompass and outperforms GPT-4o on multiple benchmarks while targeting mobile deployment.