Mixed
It basically generated a "This thing here could be a problem but there is manual validation for it" response, and when I looked, that manual validation were nowhere to be found
Hamuko on Hacker News
In the thread “Opus 4.5 is the first model that makes me fear for my job”, replying to this comment
Helped: Using Claude for code review after self-review.
Got in the way: Claude hallucinated non-existent manual validation logic.
… I was looking into a bug in a codebase filled with Claude output and for funsies decided to ask Claude about it. It basically generated a "This thing here could be a problem but there is manual validation for it" response, and when I looked, that manual validation were nowhere to be found. There's so much half-working AI-generated code everywhere that I'd feel ashamed if I had to ever meet our customers. …