LLM

A large neural network trained on enormous volumes of text (and often code and images) to predict and generate natural language. Modern LLMs such as GPT-5, Claude, and Gemini can follow instructions, reason step-by-step, use tools, and — in multimodal variants — interpret images and screens. LLMs now underpin a growing class of accessibility tools, including image description services, live captioning, screen-reader assistants, and conversational help systems, but they also introduce risks of hallucination, bias, privacy exposure when screenshots or voice are sent to cloud servers, and over-reliance that can mask underlying accessibility barriers.