I bet this bot can consistently beat even you (a human) at Connect-4! It uses the Monte-Carlo Tree search Reinforcement Technique to play
To Play: (I will surely make the frontend for this soon, (on Android or something) and link it online with a Flask API, I guess, but for now, you may play it "comfortably" on your command line interface :)
Download the Connect4_MCTS.py and run it! Just follow the instructions and enjoy