os.path.join (folder, filename) ensures the path is correct for the system. On Windows, it uses backslashes (reports\summary.txt); on Linux and macOS it uses forward slashes (reports/summary.txt).

I tested Claude 4.5 against ChatGPT-5 in 9 challenges from logic puzzles to storytelling. Here’s which AI won.

Haley Nahman was having a weird time. She had spent most of the pandemic inside, shuttling around the one-bedroom apartment she shares with her partner, Avi. “Not to paint too bleak a picture, but ...