Claude code is good, Opus as general model is a hot hallucinating piece of garbage. I asked it to review a single page 50 rows, 2 column excel file. It hallucinated almost everything in the file. It repeated that for the next two files I asked it to review, these were tiny files, barely 20 kb.

The funny part is Opus was the one which generated the files in the first place. This was Opus 4.7 High. So no thank you, Anthropic.