Mr. Deng acknowledged that any bot created with the service would be prone to mistakes. Trained on enormous amounts of data culled from across the internet, technologies like ChatGPT sometimes “hallucinate,” or make stuff up.

Because the technology can also be used to generate offensive, untruthful and even dangerous material, OpenAI said it would vet all new bots created with GPTs and disallow any that violated its terms of service. In the coming weeks, it will offer these bots through an app store similar to the one that Apple offers for iPhone applications.

The company also said any users of the service could request that their documents and other data not be used to train future versions of OpenAI’s technology.

OpenAI is facing lawsuits from writers, artists and computer programmers who argue that the company illegally used their work to build its A.I. systems.

The company said that over 100 million people actively used ChatGPT each week, and that over two million software developers used GPT-4 and other services to build apps.