Obviously this should not be taken as a representative case and I will caveat that the problem was not trivial ... basically dealing with a race condition I was

Obviously this should not be taken as a representative case and I will caveat that the problem was not trivial ... basically dealing with a race condition I was stuck with for the past 2 days. The TLDR is that all models failed to pinpoint and solve the problem including Claude 4. The file that I was working with was not even that big (433 lines of code). I managed to solve the problem myself. This should be taken as cautionary tale that despite the advances of these models we are still quite behind in terms of matching human-level performance. Otherwise, Claude 4 or 3.7 are really good at dealing with trivial stuff - sometimes exceptionally good.