Environment: RTX 4090, Python 3.12 (cp312), torch 2.9.1+cu130, triton-windows 3.2.0.post21
The standard llama-cpp-python on PyPI doesn't include the vision chat handlers. You need JamePeng's fork as a pre-built wheel.
My python was in D:\comfyui_run\ComfyUI\.venv\Scripts\python.exe