I’ve been working with gpt-5-high recently and while it’s slow as molassess it’s also pretty darn impressive in what kinds of problems it can solve. I’ve given it coding tasks which Claude fumbled and it dealt with them given the same set of tools. It was honestly impressive; it feels like it’s on the verge of unlocking a new capability by being reliable enough.

I wouldn’t be surprised if the author was taken off guard by gpt-5 if he was already impressed by Claude code.