From a quick tests, it seems to hallucinate a lot more than opus 4.6. I like to ask random knowledge questions like "What are the best chinese rpgs with a decent translations for someone who is not familiar with them? The classics one should not miss?" and 4.6 gave accurate answers, 4.7 hallucinated the name of games, gave wrong information on how to run them etc...

Seems common for any type of slightly obscure knowledge.