What is the difference between GPT and ChatGPT?

GPT, generative pre trained transformer, is the underlying model technology OpenAI develops and trains. ChatGPT is the consumer facing chat product built on top of GPT, adding a conversational interface, memory features, and tools like web search and file uploads.

Think of GPT as the engine and ChatGPT as the car built around it. OpenAI also makes GPT available through its API, which other companies use to build their own separate products, without any ChatGPT branding involved.

For someone optimizing content, the distinction rarely changes tactics, since both surfaces rely on the same underlying model to decide what to cite or summarize from the web.

Our AI search optimization softwaretracks citations across ChatGPT and any GPT powered app.