ChatGPT-O1 is quite a bit better at certain complex tasks IMO (e.g. writing a larger bit of code against a non-trivial spec and getting it right). Although the

ChatGPT-O1 is quite a bit better at certain complex tasks IMO (e.g. writing a larger bit of code against a non-trivial spec and getting it right). Although there are also some tasks that Claude are better at too.