OpenCV 5 Is Here: The Biggest Leap in Years for Computer Vision (opencv.org) AI

OpenCV 5, released June 4, 2026 (with a pip version planned for June 8), is positioned as a major modernization of the library, highlighted by a brand-new graph-based DNN engine with expanded ONNX operator support and features such as dynamic shapes, control-flow subgraphs, and attention/MatMul fusion. The post also describes improvements in hardware acceleration and 3D vision tooling, clearer Python integration, and updated documentation, while noting that the new DNN engine is CPU-only for now and can fall back to the classic engine via the same DNN API.