Alt Text Creator with GPT-4 Vision is a Chrome browser extension that utilizes the GPT-4 model from OpenAI to automatically generate alternate text for images. By simply right-clicking on an image and selecting "Create Alt Text," users can have descriptive text generated and copied to their clipboard for easy use.

To operate this extension, users are required to provide their own API key from OpenAI. Alt Text Creator optimizes its functionality by utilizing the Low Resolution mode in the API and implementing local caching to minimize per-image processing costs. For current pricing information regarding the OpenAI API, users can refer to OpenAI's website.