OpenAI has begun to resume ChatGPT Plus membership registration, inviting selected users. In the invitation, OpenAI expressed gratitude to users who signed up for the ChatGPT Plus waitlist and invited them to upgrade. ChatGPT Plus members will gain access to the GPT-4 model, the ability to use GPT, and access to other tools. Previously, OpenAI suspended new user registrations for ChatGPT Plus due to usage exceeding capacity.