The paper (published 4 days ago) has this on page 10, and says that o1-mini failed to solve it correctly:
Oliver picks 44 kiwis on Friday. Then he picks 58 kiwis on Saturday. On Sunday, he picks double the number of kiwis he did on Friday, but five of them were a bit smaller than average. How many kiwis does Oliver have?
I pasted it into ChatGPT and Claude, and all four models I tried gave the correct answer:4o mini: https://chatgpt.com/share/6709814f-9ff8-800e-8aab-127b6f952d...
4o: https://chatgpt.com/share/6709816c-3768-800e-9eb1-173dfbb5d8...
o1-mini: https://chatgpt.com/share/67098178-4088-800e-ba95-9731a75055...
3.5 sonnet: https://gist.github.com/rahimnathwani/34f93de07eb7510d57ec1e...