Businesses around the world use OpenAI's API to build customer service chatbots powered by ChatGPT's underlying models. These bots handle customer questions, route complex issues to human agents, and operate 24/7 in multiple languages. In one documented case, a single AI assistant handled work equivalent to 700 full-time human agents.

Companies including Klarna, Zendesk, HubSpot, and Salesforce have integrated OpenAI models — from GPT-3.5 through GPT-5 — into their customer service systems. Klarna's AI assistant, powered by OpenAI, handled 2.3 million conversations in its first month, which the company said was equivalent to 700 full-time agents and resulted in a 25% reduction in repeat customer inquiries. Purpose-built platforms including MavenAGI and Decagon use OpenAI models to serve companies including Tripadvisor, ClickUp, and Rippling. OpenAI's enterprise product pages explicitly position ChatGPT and the API for customer service use cases.