Tim Cook's legacy hinges on Apple's AI bet

For better or worse, Tim Cook's legacy is likely to be determined by something we don't really know the answer to yet: the company's bet to build its AI strategy partly around other companies' models. Why it matters: In the short term, the move could save substantial sums compared with building and operating a frontier-model business of its own, but it's left Apple dependent on Google for some of its most important AI capabilities. Driving the news: As John Ternus officially takes over today…