Two goliaths of the AI world, ChatGPT and Claude, have each made the argument that they have the more personable chatbot. On both the latest versions, GPT-5.1 and Claude 4.5 Sonnet, you have the ability to customize the chatbot to a personality of your choosing, best fitting how you actually use it.
For example, you could turn ChatGPT into a no-frills fact machine, ignoring any small talk and focusing on the key task of churning out your research reports. Or you could have Claude be a formal thinker, crafting the perfect letter to send over to a co-worker. I decided to test which AI chatbot is better by giving both of them seven tests across different personalities. Here's what happened.
