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Artificial intelligence is a family of computer systems that perform tasks people associate with human intelligence — recognizing patterns, generating language, or recommending actions — usually by learning statistical relationships from data rather than following only hand-written rules.

A large language model is a neural network trained on vast amounts of text to predict the next token in a sequence. That simple objective yields systems that can answer questions, write code, and follow instructions — with uneven reliability and no built-in understanding of truth.

ChatGPT is OpenAI’s consumer and business chatbot product. It wraps large language models in a conversational interface with memory, tools, and subscription tiers — making generative AI mainstream while remaining a product layer on top of rapidly changing models.

Anthropic is a San Francisco AI company best known for the Claude family of large language models. It positions itself around AI safety research and enterprise assistants, competing with OpenAI, Google, and open-weight providers for developer and corporate spend.