For AI Commands and AI Tools, we use OpenAI's GPT 4o mini. On the Basic and Team plans, it's a significant jump in AI words available, subject to a daily Fair Use limit of 80k words/day.
For our Rank Ready Document (available with the Add-on for $34.99/month), we use OpenAI's regular GPT4o. Our in-house Natural Language Processing AI is used to infuse important semantic SEO topics into the article to create a Rank Ready Document, which can also be purchases in one-time purchases for bundles on a free or paid plan (see below screenshot).