With release v5.7.0 we introduced an enhanced AI-based proofreading engine for English. It was built using modern approaches in Natural Language Processing (NLP). Unlike the classical rules or dictionary-based engines, it's based on the huge pre-trained language model. Its accuracy is at least 3 times better.

However, at the same time, there are some cons that should be taken into consideration:

You can give it a try using one of the public demos on our website: https://webspellchecker.com/wsc-proofreader/

If you are using the server-based package of WebSpellChecker v5.7.0 and higher, then you have an AI engine included in the package.