Arena CEO @ml_angelopoulos reveals the most underrated model he loves to use that isn't reflected on the leaderboards: "If you go to experts, the story's a little bit different. Because I actually use 5.6 Sol." "This is one of the questions that we got asked in the X thread where we were asking for questions. What's the most underrated model that I love to use but that isn't reflected as highly on the leaderboards? For me, it's actually Sol xHigh." "That's because I do a lot of advanced math…