I play Quartiles in Apple News app daily (https://support.apple.com/guide/iphone/solve-quartiles-puzzl...). Occasionally when I get stuck, I use ChatGPT to find a word that uses four word fragments or tiles. It never worked before GPT 5. And with GPT 5 it works only with reasoning enabled. Even then, there is no guarantee it will find the correct word and may end up hallucinating badly.