Hacker News thread: Why does Opus 5 feel worse to work with?

A widely shared post said Opus 5 benchmarks higher than Opus 4.7 and 4.8 but needs more supervision because it makes assumptions and reinterprets plans without asking. The thread drew 993 points and 874 comments.

Who is affected:

Developers using Claude Opus 5 for interactive coding.

What to do:

Compare Opus 5.5 on your own tasks before staying on Opus 5.