On March 14th, OpenAI released a waiting list for access to their GPT-4 language model, which was also made available for paying users of ChatGPT the same day. I got access 20 minutes ago, and this is how you can use it in Optimizely CMS!
On March 1st, OpenAI released their Chat completion API using the gpt-3.5-turbo language model, the same language model used by ChatGPT. Learn how you can add ChatGPT-capabilities to Optimizely CMS.