Indeed, O3 and the early ChatGPT 5 thinking mode models were like this.

I stopped using ChatGPT for a while around this time and had a good experience using Claude exclusively, then I had to go back after Sol was released as Claude was driving me nuts.

I found that ChatGPT was greatly improved personality-wise from where it had been when I left, and now in my opinion is a better experience than the Claude models.

I’m really not trying to shill for OpenAI here, I’d much prefer to use Anthropic models if they were less annoying.