I've been using DuckDuckGo's AI Chat relatively a lot lately and it has always worked for me. Well, with one exception, I was able to break it accidentally by including a specific special character in the input, which then it tried to respond with, and then it failed to load the response. Luckily I was about to tell it to refer to that character in a different way. I don't remember which character was it, but not a punctuation mark, not something rare I copied from somewhere. Maybe one that's often displayed with an empty rectangle in UTF-8.

I like that anything I do there is not tied to an account, but not even to an IP address or anything like that, assuming that I trust DDG with it, because it acts as a proxy. Sure, it doesn't have the latest version of ChatGPT and Claude, but I don't need cutting edge tech either, they work fine enough, and this added privacy is more important to me.