Best free/open-source AI model for understanding screenshots?

I'm looking for a free vision AI/VLM that can take a screenshot and understand what's on the screen. My requirements: Read text from screenshots Understand UI elements/buttons/windows Describe what is happening on the screen Answer questions about the screenshot Preferably run locally Python support would be a big plus I don't need image generation Smaller/faster model is preferred What is currently the best free/open-weight vision model for this use case? Qwen-VL, Gemma, MiniCPM, or something newer? I'm mainly interested in screen understanding/AI computer automation, not just OCR. Thanks! su